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goldenfox [79]
3 years ago
15

Which expression is equivalent to 4^7x 4-^5

Mathematics
1 answer:
g100num [7]3 years ago
5 0
The expression equivalent to this is 16
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Find the surface area of a sphere with a radius of 1. Use 3.14 for π. Round your answer to the nearest tenth.
Butoxors [25]
The formula for finding the surface area of a sphere is A=4πr^{2}. Since we already have the radius, we just plug that into the equation, like so:
A = 4 x 3.14 x 1^{2}
First, following the rules of PEMDAS, do the exponent, coming out with an answer of 1. Now, multiply 4 x 3.14, which is 12.56. 12.56 x 1 = 12.56.
Rounded to the nearest tenth, your answer is 12.6.
Hope this helps!
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4 years ago
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What is the volume of the cube when one side is 2 1/2 in
oksian1 [2.3K]

Answer:

15 5/8 in³  (=15.625 in³)

Step-by-step explanation:

recall

volume of cube = length ³

given length = 2 1/2 = 5/2 inches

volume of cube,

= (5/2) ³

= 5³ / 2³

= 125 / 8

= 15 5/8 in³

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4 years ago
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B is your answer
Area of a circle is pi r^2 so pi8^2 is the formula for this one (radius is half of the diameter)
4 0
3 years ago
A baby's crib has an area of 690:square inches and a perimeter of 106 inches.What are the dimensions of the crib
KengaRu [80]

Answer:

The crib is 30 inches wide and 23 inches long.

Step-by-step explanation:

Assuming that the crib is rectangular, then the crib has a length L and a width W.

And remember that for a rectangle of width W and length L, the perimeter is:

P = 2*L + 2*W = 2*(L + W)

And the area is:

A = L*W

In this case, the perimeter is 106 in, then:

P = 106in = 2*(L + W)

And we also know that the area is 690 in^2

Then:

A = 690in^2 = L*W

Then we have a system of equations:

106in = 2*(L + W)

690in^2 = L*W

To solve this, first, we need to isolate one of the variables in one of the equations.

Let's isolate L in the first one:

106in/2 = L + W

53 in = L + W

53in - W = L

Now we can replace this in the other equation:

690in^2 = L*W = (53in - W)*W = 53in*W - W^2

690in^2 =  53in*W - W^2

Now we need to solve this for W.

This is a quadratic equation:

W^2 - 53in*W + 690 in^2 = 0

The solutions of this equation are given by Bhaskara's formula:

W = \frac{-(-53in)\pm \sqrt{(-53in)^2 - 4*1*(690in^2)}  }{2} =  \frac{57in \pm 7in}{2}

Then the two possible solutions of W are:

W = (53in + 7in)/2 = 30in

W = (53in - 7in)/2 = 23in

We can choose any one of these, so let's choose W = 30in

If we replace this in the equation: "53in - W = L"

We can find the value of L:

53in - 30in = 23in = L

Then we have:

W = 30in

L = 23in

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3 years ago
Find the x-intercept of f(×)=(×+2)/(×+1)​
Usimov [2.4K]
The x intercept of f(x)=(x+2)/(x+1) is (-2,0)
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3 years ago
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