Help me please I need it

Answer:

92

Step-by-step explanation:

83*4 = 332

And 80*3 = 240

332-240 = 92

So you would need 92

Answer:

i need help

Step-by-step explanation:

9514 1404 393

Answer:

  A. Given; B. multiplication; C. distributive; D. collect terms; E. addition; F. division

Step-by-step explanation:

You are expected to compare each line to the previous line and identify the changes. Apart from combining like terms (collecting terms), there are generally only three properties of interest: distributive property, addition property, multiplication property. Of course, subtraction and division are just addition and multiplication using the appropriate (additive, multiplicative) inverse.

The distributive property involves adding or deleting parentheses, so it is easy to identify.

If terms disappear, it can be due to terms being combined, or due to addition/subtraction. If coefficients disappear, it will generally be due to multiplication/division.

__

-2.5(-2-3x)+2.5(-4x-1) = -2x -4x . . . . Given

-5(-2 -3x) +5(-4x -1) = -4x -8x . . . . multiplication by 2 (fractions eliminated)

10 +15x -20x -5 = -4x -8x . . . . distributive property (eliminate parentheses)

-5x +5 = -12x . . . . collect terms

5 = -7x . . . . addition of 5x (-5x term disappeared)

-5/7 = x . . . . division by -7 (x coefficient of -7 disappeared)

Answer:

(5,3)

Step-by-step explanation:

Well to solve the following,

y = 8 - x

y = x - 2

Graphically.

We need to graph both equations,

Look at the image below ↓

By looking at the graph we can tell the intercept point is at (5,3).

Thus,

the solution is (5,3).

Hope this helps :)

ANSWER

EXPLANATION

Given;

Recall;

Therefore, the time taken is 3.2hours.

The minimal sample size needed for a 95% confidence interval to have a maximal margin of error of 0.1 in the following scenarios are,

a preliminary estimate for p is 0.33 is the sample is n=76.

there is no preliminary estimate for p the sample size is \($n=97$\).

As per the question Margin of Error=0.1

E=0.1

At \($95 \%$\) confidence level the \($z$\) is,

\($$\begin{aligned}& \alpha=1-95 \%=1-0.95=0.05 \\& \frac{\alpha}{2} =\frac{0.05}{2} =0.025 \\& Z_{\frac{\alpha}{2} }=Z_{0.025}=1.96\end{aligned}$$\)

\($$Z_{\frac{\alpha}{2} }=1.96$\\\\(a)$\dot{\mathbf{p}}=0.33$$\)

We have to determine the sample size :

\($$\mathrm{n}=\left(\frac{Z_{\frac{a}{2}}}{\mathrm{E}}\right)^2 \times \hat{\mathrm{p}} \times(1-\hat{\mathrm{p}})=\left(\frac{1.96}{0.1}\right)^2 \times 0.33 \times 0.73=76$$\)

\($n=76$\)

Therefore the size of the sample is n=76

b) There is no preliminary estimate for p

So we will consider,

\($\dot{\mathbf{p}}=0.5$$\)

Sample size is,

\($$\mathrm{n}=\left(\frac{1.96}{0.1}\right)^2 \times 0.5 \times 0.5=97$$\)

Therefore the sample size is \($n=97$\)

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The component form of the vector that translates A to A' is (11, -17)

A translation is a type of transformation that takes each point in a figure and slides it the same distance in the same direction.

In translation, the shape of the figure does not change but its size may change.

Other transformation processes are reflection and rotation.

The component form of the vector is governed by the rule; A' - A

so we subtract corresponding x- coordinates and corresponding y- coordinates

A' - A = (7, -9) - (-4, 8)

       = ( 7 - - 4, -9 - 8)

       -= ( 11, -17)

In conclusion, the vector that translates A to A' is ( 11, -17 )

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Answer:

729 m^3

Step-by-step explanation:

Volume of cube = a^3

a= 9m

a^3= 9^3

hence volume = 729m^3

Answer:

17

Step-by-step explanation:

To solve this problem, we need to use the distance between two points formula. It states that the distance is \(\sqrt{(x_{1} - x_{2} ) ^{2} + (y_{1} - y_{2})^{2} }\). Here, \(x_{1} = 1, x_{2} = 9, y_{1} = 0, y_{2} = 15\). Plugging these values in gets us \(\sqrt{64 + 225}\) which equals \(\sqrt{289}\) = 17 .

Answer: $74.38

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

76, 70, 64, 58, 52

Step-by-step explanation:

76 - 6 = 70

70 - 6 = 64

64 - 6 = 58

58 - 6 = 52

Answer:

76,70,64,58,52

Step-by-step explanation:

Observation all the terms in the pattern are even.

The value of the triple integral ∭\(e^{x^{2} y^{2} }\) dv in cylindrical coordinates is ∞ * (16 - 4(\(r^{2}\))) * 2π.

To evaluate the triple integral ∭\(e^{x^{2} y^{2} }\)dv in cylindrical coordinates, we need to express the differential volume element dv in terms of cylindrical coordinates.

In cylindrical coordinates, we have:

x = r * cos(θ)

y = r * sin(θ)

z = z

The differential volume element in Cartesian coordinates (dx * dy * dz) can be expressed in cylindrical coordinates as:

dv = r * dr * d(θ) * dz

Now, let's convert the integral limits and the integrand into cylindrical coordinates.

The solid e is bounded by the circular paraboloid z = 16 - 4(\(x^{2}\) + \(y^{2}\)) and the xy-plane. In cylindrical coordinates, the equation of the paraboloid becomes:

z = 16 - 4(\(r^{2}\))

The integral limits for cylindrical coordinates are:

r: 0 to ∞

(θ): 0 to 2π

z: 0 to 16 - 4(\(r^{2}\))

The integrand is: \(e^{x^{2} y^{2} }\)

Substituting the expressions in cylindrical coordinates, the triple integral becomes:

∭\(e^{x^{2} y^{2} }\) dv = ∫∫∫r * \(e^{r^{2} }\)* \(cos^{2}\)(θ) * \(sin^{2}\)(θ)) * r * dr * d(θ) * dz

Simplifying:

∭\(e^{x^{2} y^{2} }\) dv = ∫∫∫\(e^{2}\) * \(e^{r^{2} }\) * \(cos^{2}\)(θ) * \(sin^{2}\)(θ)) * dr * d(θ) * dz

Now, let's evaluate the triple integral using the provided limits.

∫∫∫\(r^{2}\) * \(e^{r^{2} }\) * \(cos^{2}\)(θ) * \(sin^{2}\)(θ)) * dr * d(θ) * dz

The innermost integral with respect to r:

∫\(r^{2}\) * \(e^{r^{2} }\) *\(cos^{2}\)(θ) * \(sin^{2}\)(θ)) dr = (1/2) * \(e^{r^{2} }\) * \(cos^{2}\)(θ) *\(sin^{2}\)(θ))

Integrating the above expression with respect to r from 0 to ∞, we get:

(1/2) * ∞ - (1/2) * 0 = ∞

Now, the remaining integral is:

∫∫∫∞ * d(θ) * dz

Integrating the above expression with respect to theta from 0 to 2π and z from 0 to 16 - 4(\(r^{2}\)), we get:

∫(0 to 2π) ∫(0 to 16 - 4(\(r^{2}\))) ∞ * d(theta) * dz = ∞ * (16 - 4(\(r^{2}\))) * 2π

Therefore, the value of the triple integral ∭\(e^{x^{2} y^{2} }\) dv in cylindrical coordinates, where e is the solid bounded by the circular paraboloid z = 16 - 4(\(x^{2}\) + \(y^{2}\)) and the xy-plane, is ∞ * (16 - 4(\(r^{2}\))) * 2π.

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Answer:

it must be C because it has a better explanation

Answer:

(pound sign) 11.44

Step-by-step explanation:

Answer:

12 km

Step-by-step explanation:

The biker is 1/8th as fast as the car....so the biker will only cover 1/8th the distance

1/8 * 96 = 12 km

Answer:

Step-by-step explanation:

Odd function graph:

Even function graph:

Complete Question

Situation: A 25 gram sample of a substance used for drug research has a k-value of 0.1205. \(N=N_0e^-kt\)

Find the substance's half-life in days, round to the nearest tenth.

Answer:

5.8 days

Step-by-step explanation:

The decay model for drugs and radioactive substances is given as

\(N=N_0e^{-Kt}\)

The half-life of any substance is the time it takes for the substance to decay to half its initial amount. That is the period it takes for:

\(N(t)=\dfrac{N_0}{2}\)

If we substitute this into the model, we obtain:

\(\dfrac{N_0}{2}=N_0e^{-Kt}\\$Dividing both sides by N_o\\\dfrac12=e^{-Kt}\)

We can solve for t.

Taking the natural logarithm of both sides

\(\ln\dfrac12=\ln e^{-Kt}\\\implies-\ln2=-Kt\\t=\dfrac{\ln2}{k} \\$Since k=0.1205$\\t_{1/2}=\dfrac{\ln2}{0.1205}=5.8$ days (to the nearest tenth)\)

Answer:

20 ft by 12 ft

Step-by-step explanation:

(10 in x 24) / 12 ft = (240 in / 12 ft) = 20 ft

(6 in x 24) / 12 ft = (144 in / 12 ft) = 12 ft

Answer: You can see if the graphs of the two populations meet at a given point.

Step-by-step explanation:

If we have a graph of population vs time

such that y = population and x = time, two different populations will be exactly the same for a given time if we have an intersection of the two graphs. The value (x0, y0) where the graphs cross is the time = x0 and the population y0, this means that both populations have y0 individuals at the same time.

The probability that from a bag containing nine marbles, numbered one through nine, and one marble is blindly chosen, it will be a 7 is 0.11.

The probability refers to the chance of an expected event, outcome, or success happens amid several possible events, outcomes, or successes.

Probability values lie between 0 and 1, depending on the certainty level.

We can represent probability as a fraction, decimal, percentage, or zero or one.

The total number of marbles in a bag = 9

The numbering of the marbles = 1 through 9

The probability of selecting a 7 = 1/9 = 0.11 = 11%

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The value of x corresponds to option B: 10.5 as the figure provided has two congruent figures inside it.

From the given image, we can consider that that the two triangles- one for which side x is given, and another for which measurements of both sides are given- are congruent. This is because they both have one common side and one angle equal to another at a vertex (refer image).

Thus, we have:

(x / 19.3) = (3.9 / 7.2)

Then, attempting to find the value of x we have:

x = (3.9 / 7.2) × (19.3)

= 10.5

Therefore, option B gives the measure of the side x of the given triangle, where x = 10.5.

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Answer:

Step-by-step explanation:

a) U -----> union

Union  of two sets is the set of all distinct elements that are in A or B

A U B = {8 , 14 , 17 , 16, 9 , 15}

∩ ----------> intersection

Intersection of two sets is the set of all distinct elements  that are in both A and B

A ∩ B = {14,17}

b) A' = {9 , 15 , 16 , 10 , 11 , 12 , 13}

P(A') = 7/10

The light beam will be estimated to be moving at 150,000 km/s, or 0.5 times the speed of light amount , if observed from the viewpoint of the extraterrestrial in the spaceship.

Speed of light (c) = 300,000 km/s

Speed of alien ship (v) = 0.5c = 150,000 km/s

Relative speed of light beam (v') = c + v = c + 0.5c = 1.5c = 450,000 km/s

Therefore, an alien on the spaceship would measure the light beam to be traveling at 1.5 times the speed of light, or 450,000 km/s.

This is due to the fact that, in comparison to an observer on Earth, the alien is moving at a speed of half that of light. As a result, in relation to the extraterrestrial inside the spaceship, the light beam will appear to be moving at half the speed of light. This is due to the constant speed of light, which means that the beam's speed in relation to the spacecraft will be slower than the speed of light in relation to the observer on Earth. Since the other speeds indicated in the question are measured in relation to an observer on Earth, they are not pertinent.

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Answer:

$ 327.08

Step-by-step explanation:

Let x = width of the container,

Then Length of the container = 2x

Let h = height of the container,

volume of the container can be calculated as length × width × height

= 2x × x × h

= 2x² h

Then we can say Volume =

= 2x² h=10

If we simplify inorder to get h

We have h= 5/x²

Then the area= (2L×h) +(2xh)

Where L is lenght

x= wish

h= height

= 2× 2x × h+ x× h

= 4x× 5/x + 2x × 5/x

Area = 30/x

Now, the area of the base = length × width

But from question, for the base costs $20 per square meter. Material for the sides costs $12 per square meter

Then the cost C(x)= 2x²× 20+30/x ×12

C(x)= 40x²+35/x²

If we differenciate wrt x we have

C(x)= 80-360/x²

If we equate C(x)=0the

80=360/x²

x= 1.651

If substitute to C(x)= 40x²+35/x²

C(x) = 40(1.651)² + 35/(1.651)²

We have cost= 327.08

Answer:

$2000

Step-by-step explanation:

3,000,000/1500=$2000

Answer:

Oblique rectangular prism

Answer:

w = 32

Step-by-step explanation:

Remark

The value of the exterior angle (marked w + 33) = the sum of the two angles not connected to it. w and w + 1

Equation

w + w + 1 = w + 33

Solution

2w + 1 = w + 33      Subtract w from both sides.

2w - w + 1 = 33       Combine

w + 1 = 33               Subtract 1 from both sides.

w = 33 - 1

w= 32        

If one-tower can hold 4.37×10⁶ gallons of water and other tower can hold 3.92×10⁶ gallons of water, then combined water capacity of two towers is 8.29×10⁶ gallons.

In order to find the combined water capacity of the two towers, we simply need to add their individual capacities.

The water capacity of one tower is = 4.37×10⁶ gallons of water, and the water capacity of other tower is = 3.92×10⁶ gallons of water,

So, their combined capacity is:

⇒ 4.37×10⁶ + 3.92×10⁶ = 8.29×10⁶ gallons

Therefore, the combined water capacity of the two towers is 8.29×10⁶ gallons.

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The given question is incomplete, the complete question is

A city has two water towers. one tower holds 4.37×10⁶ gallons of water and the other holds 3.92×10⁶ gallons of water. What is the combined water capacity of the two towers?

two number cubes are rolled to determine how a token moves on a board game. The explanation for this is that board games often use number cubes (also known as dice) to add an element of chance and randomness to the game. By rolling two cubes, players can get a larger range of possible outcomes and the movement of their token becomes less predictable.

The conclusion is that using number cubes is a common and fun way to add excitement to board games.
When two number cubes (dice) are rolled to determine the movement of a token in a board game, the sum of the numbers on the top faces of the two dice dictates the number of spaces the token will move.

Number cubes, or dice, typically have six faces, numbered from 1 to 6. When rolling two dice, there are 36 possible outcomes (6 faces on die 1 x 6 faces on die 2). To determine the movement of the token on the board, add the numbers rolled on both dice together. For example, if die 1 shows a 3 and die 2 shows a 5, the token will move 8 spaces (3+5).

In a board game that uses two number cubes to determine token movement, the sum of the number rolled on the two dice dictates how many spaces the token advances on the board.

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