1. Two circles have radii 8 cm and 12 cm, respectively. The ratio of their circumferences is _______ and the ratio of their areas is ________.
2. Two circles have radii 5 and 7. The ratio of their area is _________.
3. The areas of two circles are 144π and 64π. The ratio of their circumference is ________.
The ratio of their circumference =200.96cm² : 308.16 cm² and the ratio of the area = 50.24cm: 75.36cm.
How to calculate the area and circumference of the given circle?The formula that can be used to calculate the area of a circle = πr².
π= 3.14
r= 8cm
area= 3.14×8²
= 3.14× 64= 200.96cm²
For the second circle ;
area = 3.14 × 12²
= 2.14 × 144
= 308.16 cm²
The circumference of the first circle = 2πr
= 2×3.14×8
= 50.24cm
The circumference of the second circle;
= 2×3.14×12
= 75.36cm.
Learn more about circles here:
https://brainly.com/question/24375372
#SPJ1
graph the line that contains the point (-2,7) and has slope of 4
describe the graph of the solution
First, we want to note two things:
We have a solid circle at -10, so -10 IS part of the solution.We have shading to the right of -10, meaning we also need to include numbers to the right of -10, or numbers greater than -10.
We can describe this with an inequality: x ≥ -10
Be sure you use ≥ and not >, since -10 is included.
We can describe this with interval notation: [ -10, infty )
Be sure you use [ and not ( on -10, since -10 is included.
You can also use set-builder notation: { x | x ≥ -10 }
Taylor buys dog food in bulk at the cost of $1.27 a pound. If he buys $107.95 of dog food, how many pounds will
he be buying?
Answer: 85 lbs
Step-by-step explanation:
$107.95 / $1.27 = 85 pounds of dog food
please help asap
Jordan's recipe for chocolate cake asks
for 2 с of flour, c of butter, and 1 c of
sugar, among other ingredients. How
much flour, butter, and sugar will she
need to make three cakes?
Answer:
what is the butter amount?
Step-by-step explanation:
x's everything by 3
2x3=6 c of flour
1x3=3 c of sugar
What makes the value of x makes the equation true?
\(7x = 80 + 9x\)
Answer:
\(x=-40\)
Step-by-step explanation:
You need to find the value of x. To do this, you need to isolate the variable:
\(7x=80+9x\)
Move the 80 to the left side of the equation using the reverse operation of '+', which is subtraction:
\(7x-80=80-80+9x\\\\7x-80=9x\)
Now move the coefficient, 7x, to the right side of the equation using the reverse operation of addition (because it's a positive number), which is subtraction:
\(7x-7x-80=9x-7x\\\\-80=2x\)
Now isolate the variable using reverse operations. The coefficient can also be seen as \(2*x\) , so the opposite of multiplication is division. Divide by 2, remembering to do the same on both sides of the equation to keep it stable:
\(-\frac{80}{2}=\frac{2x}{2}\\\\ -40=x\)
The value of x is -40.
:Done
A scientist studied bacteria.
. She placed 6 bacteria in a Petri dish
The population increases every 6 hours
Write a equation to be used to determine the number bacteria ,y, present after x days
Answer:
y=(6)x+b
Step-by-step explanation:
basil asks 40 students how many books they bought last year. the chart shows information about the number of books they each bought.
a) what is the percentage of those students who bought 20 or more books?
b) work out an estimate for the mean number of books bought.
please show the full working out.
Number of students who bought 0-4 books= 9
number of students who bought 5-9 books= 10
number of studenst who bought 10-14 books= 13
number of students who bought 15-19 books= 2
number of studenst who bought 20-24 books= 6
please show the full working out
Answer:
a) 15% b) 10.25Step-by-step explanation:
Probability is the likelihood or chance that an event will occur.
Probability = number of expected outcome/total outcome.
a)Total number of student is the total outcome = 40
Expected number of outcome is the number of students who bought 20 or more books = 6 (number of students who bought 20-24 books)
Probability of those students who bought 20 or more books = 6/40 = 0.15
Expressing as percentage = 0.15 * 100 = 15%
This means that 15% of the total students bought 20 or more books
b) Mean is calculated using the formula \(\overline x =\frac{\sum fx}{N}\)
f is the frequency
x is the midpoint of the class interval
N is the total number of students.
Check the attachment for the frequency table.
\(\overline x = \frac{410}{40}\\ \overline x = 10.25\)
Mean number of books bought is 10.25
According to an architect's design, the new rectangle stables (housing for horses) will have total dimensions of 30 yards by 10 yards. The design includes a walkway between the stables where no horses can stay. The walkway will take up 45 yards ^ 2 Each horse requires a minimum of 12yards ^ 2. How many horses at most can live in the stables?
The horses at most can live in the stables is 21
What Does the Area of a Rectangle Mean?
The area is the amount of space occupied by a flat surface with a particular shape. A "number of" square units are used in the calculation (square centimeters, square inches, square feet, etc.) An area is the number of unit squares that can fit inside a rectangle. Examples of rectangular shapes include the flat surfaces of laptop monitors, blackboards, painting canvases, etc. Use the area formula for the rectangle to calculate the area that these objects take up. Think about a rectangle that is 4 inches long and 3 inches wide, for example.
Given That
Rectangle Stables will have total dimensions of 30 yards by 10 yards
Length = 30 yards
Breath = 10 yards
Total Area of stables = Length x Breath
= 30 x 10 = 300 \(yard^{2}\)
Area of walkway = 45 \(yard^{2}\)
Hence area of horses will be = 300 - 45 = 255 \(yard^{2}\)
Now 1 horse occupy = 12 \(yard^{2}\)
so 255 \(yard^{2}\) can have = \(\frac{255}{12}=21\) horses
Hence the Answer is 21 Horses
To learn more about area visit:
brainly.com/question/27683633
#SPJ13
-10x+10y=-10 10x-10y=10
Answer:
X=-Y
Step-by-step explanation:
...........................
when a,b are real number and i^2 = -1 then what is value of |a-b| ? help me please!!!
Answer: 0
Step-by-step explanation:
The expression -350 +16.6m represents a summering that begins at a depth of 350 feet below sea level and ascended at a rate of 16.6 ft./min. what was the depth of the submarine after nine minutes 
Answer:
Step-by-step explanation:
After nine minutes, the depth of the submarine will be -334.4 ft. below sea level. This is calculated by taking the starting depth of -350 ft. and adding the amount of ascent in nine minutes (9 minutes x 16.6 ft./min. = 149.4 ft.). So the result would be -350 + 149.4 = -334.4 ft.
is x – 4 a factor of P(x) = x^4 - 4x^2 – 4x + 8 ? Explain.
Answer:
(x3 - 2x2 - 4) • (x + 2)
Step-by-step explanation:
STEP
1
:
Equation at the end of step 1
(((x4) - 22x2) - 4x) - 8
STEP
2
:
Checking for a perfect cube
2.1 x4-4x2-4x-8 is not a perfect cube
Trying to factor by pulling out :
2.2 Factoring: x4-4x2-4x-8
Thoughtfully split the expression at hand into groups, each group having two terms :
Group 1: x4-8
Group 2: -4x2-4x
Pull out from each group separately :
Group 1: (x4-8) • (1)
Group 2: (x+1) • (-4x)
Polynomial Roots Calculator :
2.3 Find roots (zeroes) of : F(x) = x4-4x2-4x-8
Polynomial Roots Calculator is a set of methods aimed at finding values of x for which F(x)=0
Rational Roots Test is one of the above mentioned tools. It would only find Rational Roots that is numbers x which can be expressed as the quotient of two integers
The Rational Root Theorem states that if a polynomial zeroes for a rational number P/Q then P is a factor of the Trailing Constant and Q is a factor of the Leading Coefficient
In this case, the Leading Coefficient is 1 and the Trailing Constant is -8.
The factor(s) are:
of the Leading Coefficient : 1
of the Trailing Constant : 1 ,2 ,4 ,8
Bianca walked
Which turtle has the fastest speed?
Michele walced
The speed of a turtle can be found by
distance by time
Vis the fastest turtle
The speed of the fastest turtle is centimeters per
minute.
Siema walked
18 min 6 minutes
Help me I’m stuck on this problem ok
Answer: The speed of the turtle can be found by dividing distance by time.
Michelle is the fastest turtle.
The fastest turtle is 6cm per minute
First turtle walks 3cm a minute
Second turtle walks 6cm a minute
Third turtle also walks 3cm a minute
its d b and d
hope this help a lot of people thank you for the points also have a good day
What is 9x (7x2+24)÷(8.1835x7)x (63%÷93)x0=
if ya know you know. first person to answer and get the correct answer gets brainly
Answer:
0 if I'm correct, it's long but it's still 0
Step-by-step explanation:
.
Answer:
It all equals to 0
Step-by-step explanation:
According to the text, in a true experimental study, the subjects should be assigned to groups randomly. If this is not possible and a researcher uses intact groups, they are performing a
According to the text, in a true experimental study, the subjects should be assigned to groups randomly. If this is not possible and a researcher uses intact groups, they are performing a quasi-experimental study.
Quasi-experimental studies are research designs that include some elements of an experimental study but are lacking in the key feature of random assignment to a treatment or control group. Researchers may compare groups that already exist, for example, individuals who already smoke and those who do not. Because the groups are not chosen randomly, researchers cannot attribute differences in results to the effects of the treatment in question.A quasi-experimental study is a type of study in which researchers analyze a natural experiment in which subjects in the study are not randomly assigned to the treatment and control groups. The goal is to compare the outcomes of the treatment and control groups while minimizing the effects of other factors that might interfere with the results.
Know more about Quasi-experimental studies here:
https://brainly.com/question/17310479
#SPJ11
Shawn is a member of a book club. He pays a $50 yearly membership fee and can purchase books through the club for $5 each. His total annual cost is a function of the number of books, b, that he purchases in a year: C(b) = 5b + 50 What is the total cost if he purchases 17 books in a year?
Answer:
f19 11 a1
Step-by-step explanation:
when you got a glooklook it shoot shoot g
a student government organization is selling christmas trees as a fundraiser. on friday, they sold noble fir trees and douglas fir trees for a total of . on saturday, noble fir trees and douglas fir trees were sold for a total of . what is the cost per tree for each type?
In linear equation, the noble is $ 120 and the douglas is $200 are the cost per tree for each type.
What in mathematics is a linear equation?
A linear equation is a first-order (linear) term plus a constant in the algebraic form y=mx+b, where m is the slope and b is the y-intercept.Sometimes, the aforementioned is referred to as a "linear equation of two variables," where x and y are the variables.n= noble fir trees
d= douglas fir trees
5n + 3d = $420
12n + 9d = $1,080
multiply the second equation by 3
36n + 18d = 3,240
now divide the equation by 18
2n + d = 180
-2n -2n
d = 180 - 2n
Now put that equation in the first as d
5n + 3(180 -2n) = 420
5n + 540- 6n = 420
- 540 -540
1n = 120
n = 120
Now put n into the second equation( none changed one) to find d
12(120) + 9d = 3240
1440 + 9d = 3240
-1440 -1440
9d = 1800
÷9 ÷9
d= 200
so the noble is $ 120
and the douglas is $200
Learn more about linear equation
brainly.com/question/11897796
#SPJ4
The complete question is -
A student government organization is selling Christmas trees as a fundraiser. On Friday, they sold 5 noble fir trees and 3 douglas fir trees for a total of $420. On Saturday, 12 noble fir trees and 9 douglas fir trees were sold for a total of $1,080. What is the cost per tree for each type?
Alex was thinking of a number. Alex doubles it and gets an answer of 16,9. What was the
original number ?
Answer:
8.45
Step-by-step explanation:
I have school
Answer:
The answer is...
Step-by-step explanation:
1. the First one is 8
2. the second one is 4.2
Just divide 16 and 9 by 2
Hope this helped
:)
in calcarea(), width and height are _____ public static void calcarea(int width, int height){}; Question options:
arguments
statements
parameters
method names
in calcarea(), width and height are parameters public static void calcarea(int width, int height){}; The correct answer is C.
In programming, parameters are variables that are defined in the method signature and are used to receive values from the arguments passed to the method when it is called. Parameters act as placeholders within the method and allow for the method to work with different values each time it is called.
In the case of the method "calcarea(int width, int height)", "width" and "height" are the parameters. They are placeholders for the actual values that will be provided when the method is called. The method expects two integer values to be passed as arguments, which will then be assigned to the respective parameters within the method body.
Learn more about calcarea() at https://brainly.com/question/31021302
#SPJ11
Jack cuts a block of wood along the red line when he looks at the newly exposed face what is the shape of the cross section
Answer:
d i would think hope it helps
Answer:
rectangle 10 by 6 or something like that
Step-by-step explanation:
please help me.--------------------------------
Answer:
tan 33° = 0.6494
C = 65°
Step-by-step explanation:
Use a calculator.
tan 33° = 0.6494
cos C = 0.4226
Use the inverse cosine function on a calculator.
C = 65°
HELPPP!!!
2 to the power of 5 x 2 to the power of 3
I do know that the answer is 256 but
I don't know HOW to find it!
Step-by-step explanation:
I use a thing call
P-parenthesis
E-exponents
M D-Multiplication and division (Left to right)
A S- Addition and Subtraction (left to right)
We need to wait to use the exponents so 5x2=10, Add the 2 power to ten so 10^2.=100. 100^3.
9 yd
8 yd
8 yd
8 yd
Find the combined volume of the structure that is made
up of a prism and a pyramid.
Answer:
9YD THIS IS MY ANSWERStep-by-step explanation:
this is no wrong thi is perfect answer ok
heart follow and star
plz help with this -5/7x - 8/21x + 1/3x
Answer:
-68
Step-by-step explanation:
A country with an absolute advantage for a specific product is able to:
O A. consistently purchase the product in extremely large amounts.
B. prevent domestic businesses from importing the product.
C. produce the product more efficiently than another country.
O D. force another country to trade the product at a very low price.
SUBMIT
The write answer of your question is C
3. this is a problem from ars magna. find two numbers the sum of whose squares is 100. the product of the two numbers is equal to twice their sum. let x and y represent the two numbers. write the system of equations that represents the problem.
The system of equations is: x^2 + y^2 = 100 and xy = 2(x + y)
To write the system of equations that represents the problem, we can use the given information. Let's use x and y to represent the two numbers.
1. The sum of whose squares is 100:
x^2 + y^2 = 100
2. The product of the two numbers is equal to twice their sum:
xy = 2(x + y)
So, the system of equations is:
x^2 + y^2 = 100
xy = 2(x + y)
Learn more about equation :
https://brainly.com/question/29657992
#SPJ11
what is the difference between slope and rate of change
The slope is the steepness of a line on a graph and represents the ratio of the vertical change to the horizontal change, the rate of change refers to the amount of change in one variable corresponding to a unit change in another variable.
The slope of a line is a measure of its steepness or incline. It is calculated by dividing the vertical change (change in y-values) by the horizontal change (change in x-values) between two points on the line. The slope indicates how much the dependent variable (y) changes with respect to a unit change in the independent variable (x). In other words, it represents the ratio of the rise (vertical change) to the run (horizontal change) on the graph.
On the other hand, the rate of change is a broader concept that applies to any relationship between two variables, not just linear relationships. It measures how one variable changes in response to a unit change in another variable. The rate of change can be positive, indicating an increase in one variable for every unit increase in the other variable, or negative, indicating a decrease. It can also vary across different intervals of the relationship, indicating that the relationship is not constant.
In summary, the slope specifically refers to the steepness of a line on a graph and is calculated as the ratio of the vertical change to the horizontal change. The rate of change, on the other hand, is a more general concept that describes how one variable changes in response to a unit change in another variable and can be applied to any type of relationship between variables.
Learn more about slope here:
https://brainly.com/question/2491620
#SPJ11
PLEASE HURRY. An electrician charges $45 per hour plus a fixed charge of $30 which of these equations could be used to determine C, the cost an electrician charges for h hours of work?
$45 per hour plus a fixed change of $30
The probability that X is a 2, 11, or 12 is:
a.) 1/36
b.) 2/36
c.) 3/36
d.) 4/36
Answer:
The correct answer is c.) 3/36.There are three favorable outcomes (2, 11, and 12) out of a total of 36 possible outcomes (assuming a fair six-sided number cube). Therefore, the probability of X being a 2, 11, or 12 is 3/36, which can be simplified to 1/12.
Step-by-step explanation: