Mathematics Middle School

Evelyn started an online business the profit in year one was $300 her profit last year was $90,000. Write each number in scientific notation then determine how many times greater last year’s profit was compared to her first year.

Answers

Answer 1

Answer:

300 in scientific notation = 3.0 * 10^2

90,000 in scientific notation = 9.0 * 10^4

90,000/300 = 300 times greater

Step-by-step explanation:

Related Questions

Earn points, answer both questions!

Answers

Answer:

Area of five squares = 1289.09 square units

Perimeter = 194.6 units

Step-by-step explanation:

Area of square and perimeter:

First find the length of each square, then find the area of each square.

To find the area of five squares, add all the area of each square.

Side of square1 = 27 units

$\sf Side \ of \ square2 = \dfrac{2}{3}*27=2*9 = 18 \ units\\\\Side \ of\ square3= \dfrac{2}{3}*18=2*6=12 \ units\\\\Side \ of \ square4=\dfrac{2}{3}*12=2*4=8 \ units\\\\Side \ of \ square5=\dfrac{2}{3}*8=\dfrac{16}{3}=5.3 \ units$

Area of square1 = 27*27 = 729 square units

Area of square2 = 18*18 = 324 square units

Area of square3 = 12*12 = 144 square units

Area of square4 = 8*8 = 64 square units

Area of square5 = 5.3*5.3 = 28.09 square units

Area of five squares = 729 + 324 + 144 + 64 +28.09

= 1289.09 square units

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Perimeter of the composite figure = (27 + 27+27+9) + (18+18+6) +(12+12+4) + (8+8+2.7)+ (5.3+5.3+5.3)

= 90 + 42 + 28 + 18.7 + 15.9

= 194.6 units

the area of the five squares is 1289.09 square units

the perimeter is 194.6 units

Solve.

−0.55p − 7 = 0.45p

The solution is p =
HELPP PLZ

Answers

Answer:

p=-7

Step-by-step explanation:

-0.55p-7=0.45p

-7=0.45p+0.55p

-7=p

What is the GCF for 8 and 36?

Answers

4 is the answer I’m pretty sure

Answer:

Step-by-step explanation:

because the factors of 8 are 2, 4, 8.

The factors of 36 are 2, 4, 9, 12.

the greatest of them both are 4

please mark brainl thank youuuu

How can the figure below be changed so that the diagonals form two lines of symmetry?

Move point B one unit up.
Move point A one unit to the left.
Move point C one unit to the left.
Move point D one unit to the right.

Answers

Moving point c one unit to the left

Move point c one unit to the left

Type a digit that makes this statement true.
153,80(number here) is divisible by 5.

Answers

Answer:

5Hope it helps!

Step-by-step explanation:

153805 is divisible by 5

The answer would be 5!
I hope this help!

Help me im almost done

Answers

Answer:

Iready is easy.

Step-by-step explanation:

Try your best dont use brainly to answer

pick which one you feel more confident about it.

4. Look at the polyhedron that you chose at the beginning. Which two solids do you need to create your polyhedron? How many of each solid do you need? (i chose a Octahedron with tetrahedrons)

Answers

Answer:

I am currently doing that one as well right know and I think that you need two octahedrons, and 8 tetrahedrons

Step-by-step explanation:

Carmen drew a scale drawing of a house and its lot. In real life, the lawn in the backyard is 72 meters long. It is 24 millimeters long in the picture. What is the scale of the drawing?
1 millimeter : ___ meters
I'm sorry that there is no picture or drawing

Answers

Answer:

1 millimeter : 3 meters

Step-by-step explanation:

Divide 72/24 = 3

three because each millimeter is equivalent to 3 meters

Identify the equivalent expression for m^1/3 x m^1/5

Answers

Answer:

m^1/15 is the answer

Step-by-step explanation:

the answer is cube root m

Identify the equivalent expression for m^1/3 x m^1/5

You have a pizza with diameter 12
2
3 in., and a square box that is 12.65 in. across. Write 12
2
3 as a decimal. Can you fit the pizza inside the box?
What is the decimal expansion for 12
2
3?
A.12.6
B.12.65
C.12.6
D.12.66
pls help me

Answers

Answer:

D is the right choice and no you cannot fit the pizza inside the box.

Step-by-step explanation:

D is the answer because to turn 2/3 into a decimal you would divide 2 by 3 and the answer you would get would be 0.66666666666...You would then add 12 to the answer and get 12.6666... Once you get this answer you would round it to the hundredths to get 12.67 but since that is not an option you could use D, 12.66 inches.

Answer:

I believe the answer is D.

Step-by-step explanation:

GOOGLE

Last year, the Golden State Warriors won 50 games. This year, they won 15 games. Which proportion represents the percent decrease in the amount of games the Golden State Warriors won?

Answers

Answer:

So, if there's an answer that's 30 that'd be it.

Step-by-step explanation:

15 + 30 = 50 therefore you add it up.

The answer would be 30 because 50-15=30

Ten mangos and twelve avocadoes cost $23. Five mangos and four avocadoes cost $10. How much do one mango and one avocado cost?

Answers

Answer:

$2.15

Step-by-step explanation:

Let mango be m

Let avocado be a

10m + 12a = 23

5m + 4a = 10

Let's get rid of the mangos in the second equation

10m + 12a = 23

-2 x (5m + 4a = 10)

Now we get:

10m + 12a =23

-10m -8a = -20

Add both the equations and we get:

4a = 3

a = $0.75

since we know that one avocado is for $0.75, we can use this value to find the cost of one mango.

5m + 4a = 10

5m + 4(0.75) = 10

5m + 3 = 10

5m = 7

m = 1.4

So, we now know that a mango cost $1.4

To find the cost of one mango and one avocado:

a + m = 0.75 + 1.4 = 2.15

Therefore, the cost of one mango and one avocado is $2.15

The required cost of one mango is 1.4 and cost of one avocado is 0.75.

What is an equation ?

An equation is a combination of different variables, in which two mathematical expressions are equal to each other.

Given that,

Cost of ten mangos and twelve avocados is $23,

And cost of five mangos and four avocados is $10.

Let cost of mangoes be represented as M and cost of avocados be represented as A,

The equation can be written as,

10 M + 12 A = 23 (1)

5 M + 4 A = 10 (2)

By solving equation (1) and (2),

M = 7/5 = 1.4

N = 3/4 = 0.75

The cost of one mango is 1.4 and cost of one avocado is 0.75.

To know more about Equation on:

brainly.com/question/187506

#SPJ2

Factor 8a + 16c using GCF

Answers

Answer: 8(a + 2c)

Step-by-step explanation:

Rowena used small wooden cubes to measure the length of her foot and her hand. Her foot was 22 cubes long and her had was 15 cubes long. Which number sentence should Rowena use to find the difference between these lengths?

A. 22 + 15
B. 22-15
C. 22 x 15
D. 22 ÷ 15

Answers

A. Or B.

I picked this in one of my questions and I don’t remember which specific one but the one or other should be correct.

The answer is B, because it is asking for the difference which is subtraction.

The stem-and-leaf plot displays data collected on the size of 15 classes at two different schools.

Mountain View School Seaside School
0 5, 8
9, 8, 2, 0 1 0, 1, 2, 5, 6, 8
8, 7, 6, 5, 5, 4, 4, 3, 1, 0 2 5, 5, 7, 7, 8
0 3 0, 6
Key: 2 | 1 | 0 means 12 for Mountain View and 10 for Seaside

Part A: Calculate the measures of center. Show all work. (2 points)

Part B: Calculate the measures of variability. Show all work. (1 point)

Part C: If you are interested in a smaller class size, which school is a better choice for you? Explain your reasoning. (1 point)

Answers

To calculate the measures of center, we need to find the mean and median for each school.

For Mountain View School:
Data: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 0 + 1 + 2 + 3 + 4 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 8 + 8 + 8 + 9) / 19
= 100 / 19
≈ 5.26

To find the median, we need to arrange the data in ascending order: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5

For Seaside School:
Data: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 1 + 1 + 2 + 2 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 7 + 8 + 8 + 8 + 9) / 19
= 80 / 19
≈ 4.21

To find the median, we need to arrange the data in ascending order: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5

Now let's calculate the measures of variability, specifically the range and interquartile range (IQR).

Range: The range is the difference between the largest and smallest values in the dataset.

For Mountain View School:
Range: 9 - 0 = 9

For Seaside School:
Range: 9 - 0 = 9

Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1) and measures the spread of the middle 50% of the data.

For Mountain View School:
Q1 = 3
Q3 = 7
IQR = Q3 - Q1 = 7 - 3 = 4

For Seaside School:
Q1 = 2
Q3 = 7
IQR = Q3 - Q1 = 7 - 2 = 5

To determine which school is a better choice for a smaller class size, we can consider both the mean and the median.

Both the mean and median for Mountain View School are higher than those for Seaside School. This suggests that, on average, the class sizes at Mountain View School are larger than those at Seaside School. Therefore, if you are interested in a smaller class size, Seaside School would be a better choice

Part A:

For Mountain View School:
- Median: The median class size is the middle value, which is 25.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (29 + 28 + 28 + 27 + 25 + 24 + 24 + 23 + 21 + 20 + 19 + 18 + 15 + 13 + 10) / 15 = 21.27.

For Seaside School:
- Median: The median class size is the middle value, which is 20.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (25 + 25 + 27 + 27 + 28 + 28 + 28 + 30 + 31 + 35 + 36 + 38 + 40 + 43 + 45) / 15 = 31.13.

Part B:

For Mountain View School:
- Range: The range is the difference between the largest and smallest values, which is 29 - 10 = 19.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 20 and Q3 is 28. Therefore, the IQR is 28 - 20 = 8.

For Seaside School:
- Range: The range is the difference between the largest and smallest values, which is 45 - 25 = 20.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 27 and Q3 is 38. Therefore, the IQR is 38 - 27 = 11.

Part C:

If you are interested in a smaller class size, Mountain View School is a better choice for you because it has a lower mean and median class size than Seaside School.

An experiment involves rolling two dice simultaneously. The following table shows the possible outcomes using the format of (die 1,die 2).
What is the probability of rolling 2 even numbers?

Answers

To determine the probability of rolling two even numbers, we need to find the favorable outcomes (outcomes with two even numbers) and divide it by the total number of possible outcomes.

The possible outcomes when rolling two dice are:

(1,1), (1,2), (1,3), (1,4), (1,5), (1,6)

(2,1), (2,2), (2,3), (2,4), (2,5), (2,6)

(3,1), (3,2), (3,3), (3,4), (3,5), (3,6)

(4,1), (4,2), (4,3), (4,4), (4,5), (4,6)

(5,1), (5,2), (5,3), (5,4), (5,5), (5,6)

(6,1), (6,2), (6,3), (6,4), (6,5), (6,6)

Out of these, the favorable outcomes (outcomes with two even numbers) are:

(2,2), (2,4), (2,6), (4,2), (4,4), (4,6), (6,2), (6,4), (6,6)

Thus, there are 9 favorable outcomes.

The total number of possible outcomes is 36 (since each die has 6 possible outcomes).

Therefore, the probability of rolling 2 even numbers is:

$\text{Probability} = \frac{\text{Number of Favorable Outcomes}}{\text{Total Number of Possible Outcomes}} = \frac{9}{36} = \frac{1}{4} = 0.25$

Hence, the probability of rolling 2 even numbers is 0.25 or 1/4.

25% or 1/4 for rolling 2 even numbers

Help! Explain and give Correct answer

Answers

The answer is a because when you’re dealing with positive Powers you do the one on the left first and when you do the one on the left you divide the second number by two and the second number 8 so now it is four. The one on the right you double the second number by two and the second number was four so now it is eight and when the number outside of the parentheses is negative you don’t do anything with it so that is why your answer is a. (And also five and four you keep the same because when even one of them has a negative in them you keep the two main numbers the same which are five and four.)

The home cleaning company charges $300 to power-wash the siding of a house plus $15 for each window. Power Clean charges $45 per window, and the price includes power-washing the siding. How many windows must a house have to make a total cost from The Home Cleaning Company less expensive than Power Clean? Let w be the number of windows.

Answers

do 15 divided by 45 and that is your answer

Latrell and his cousin, Tisha, met at a state park to go for an all-day hike. Latrell drove 122 miles to get to the park, and it took him 2 hours. Tisha drove 96 miles to get to the park, and it took her 1.5 hours. On average, how much faster did Tisha drive than Latrell?
Write your answer as a decimal or a whole number.

Answers

Answer:

122/2=61mph

96/1.5=64mph

3 mph more

Answer:

3 Miles

Step-by-step explanation:

-1/6(12+18k) PLEASE HELP!!! Write the product.

Answers

-1/6(12+18k) => -1/6 • 12 + -1/6 • 18k

-1/6 • 12 = -12/6 = -2

1/6 • 18k = -18/6k = -3k

So the answer is -2-3k

Hope this helps :)

-2-3k

-1/6(12 + 18k)

Distribute the -1/6 with 12 and 18k.

-1/6(12) + -1/6(18k)

-12/6 + -18k/6

-2 - 3k

PLEASE HELP ME!! question below

Answers

Answer:

625??

Step-by-step explanation:

Answer:

If you used π, 157.079632679 yards or 157.08 yards rounded to the hundredths place. If you used 3.14, the answer is 157 yards.

Step-by-step explanation:

The formula to find the perimeter of a circle is P=2×π×r.

Step 1: Find the radius. In this case, the radius is 25 yards as shown in the diagram.

Step 2: Since the formula only includes multiplication, you can multiply any of the factors. For simplicity, multiply your radius by 2 first. In this case, 2×25=50.

Step 3: Multiply your last number with π. In this case, 50×π=157.079632679 or 157.08 rounded the hundredths place. 50×3.14=157.

Step 4: You found the answer! Hope this helps.

What is the answer to this question? 12/5t=6

Answers

Hope this image helps

What is the answer to this question? 12/5t=6

First, the equation is (12/5)*t = 6, right?

If it is….

t = 30/12 or 15/6 (simplified)

Steps…

((12/5)*t) * 5 = 6 * 5 -> multiplied both sides by 5 to get rid of denominator
12t = 30
12t/12 = 30/12 -> divided both sides by 12 to single out the t
t = 30/12 or 15/6

Hope this helps :)

Can someone help me.

Answers

Answer:

A. x = -6
B. x = 15

Step-by-step explanation:

$\frac{x}{3}-5=-7\\\frac{x}{3}-\frac{15}{3}=-7\\\frac{x-15}{3}=-7\\x-15 = -7*3\\x-15=-21\\x=-21+15\\x=-6$

$\frac{x}{2}-5=2.5\\\frac{x}{2}-\frac{10}{2} = 2.5\\\frac{x-10}{2}=2.5\\x-10= 2.5*2\\x-10=5\\x=5+10\\x=15\\$

I hope this helps brother! :D

a.
x/3-5=-7
+5. +5
x/3=-2
*3. *3
x=-6
b.
x/2-5=2.5
+5. +5
x/2=7.5
*2. *2
x=15

Two boxes are shown below

What is the difference in the surface areas, in square feet, of the two boxes?

Answers

Answer:

Option (B):3

Step-by-step explanation:

S.A of Box J =57ft^2 ; using formula 2(lb+lh+hb)

S.A of BoxF=54Ft^2;using formula (6a^2)

Differenceof S.A of boxes:57-54=3

C) 21 I’m not too sure but I think it’s C or B) 3

Choose Yes or No to tell whether each situation can be represented by the expression 25.75x + 10.

Carol has $25.75. She earns $10 for each car she washes.
Choose...

Max has $10. He earns $25.75 for every lawn he mows.
Choose...

Jin buys x postcards for $25.75 and x keychains for $10 each.
Choose...

Sasha sells a scarf for $10 and x jackets for $25.75 each.
Choose...

Answers

Answer:

1. No

2. Yes

3. No

4. Yes

Step-by-step explanation:

I think it would be
1. Yes
2. No
3. Yes
4. No
——————
1 would be yes because she earning $10
2 would be no because he is earning $25.75 not $10
3 would be yes because jin is earning $10
4 would be no because Sasha is earning $10 not $25.75.
————————————
I hope this is right and so sorry if its wrong!

Find the circumference of the circle. Round your answer to two decimal places, if necessary.

Answers

Answer: C=2πr

is your answer :P

Step-by-step explanation: Have a nice day!

The ice-cream shop has the following tree diagram to show the customers the
possible combinations of ice creams they sell. Justify your answer.

Answers

That answer is 18 because you need to count the different diagrams

The answer would be 18 you would add all the ice cream together

Please help!!!!! 40 points!
Josiah kept track of how many songs of each genre were played in an hour from his MP3 player. The counts are displayed in the table below. He has a total of 1,500 songs on his player. Josiah predicted the number of rock songs on his MP3 player to be 300 songs. Which statements about his solution are true? Select three choices.

Josiah’s Music
Sample 1
Sample 2
R & B
5
R & B
4
Pop
4
Pop
3
Classical
3
Classical
5
Jazz
2
Jazz
4
Rock
6
Rock
4

Josiah’s work:

StartFraction 10 over 20 EndFraction = StartFraction x over 1,500 EndFraction. StartFraction 10 times 30 over 20 times 30 EndFraction = StartFraction x over 1,500 EndFraction. 300 = x.
He should have found the average of the number of rock songs by averaging 4 and 6 to get 5.
He did not multiply the numerator and denominator by the correct number to equal 1,500.
His answer will be one-half of what he got because he did not divide 10 by 2 when setting up the proportion.
He can only solve the proportion by multiplying the numerator and denominator by a common multiple.
He should have multiplied the numerator and denominator by 75, not 30, because 20 times 75 = 1,500.