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Mkey [24]
2 years ago
12

The area of a circle is 28.26 square miles. What is the circle's diameter?

Mathematics
1 answer:
DochEvi [55]2 years ago
3 0
The diameter is 6. Explanation:

radius: 3.14r^2

28.26=3.14r^2

28.26/3.14=r^2

r^2=9

r=3

and we know that diameter is two times the radius so:

3*2=6

diameter equals 6.

if you want to check it plug back in:

3^2 * 3.14 = 28.26

hope this helped :)
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Answer:

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  2. 3.125 s

Step-by-step explanation:

It is almost too easy to let a graphing calculator show you the solution. (See attached)

_____

You may be expected to use some actual algebra (or even calculus) to find the solution.

If you've spent any time with quadratics, you know the vertex of ax²+bx+c is located at x=-b/(2a). Here, that means the time to get to the highest point is ...

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This tells us the peak of the travel of the bullet is at 168.25 ft after 3.125 seconds.

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