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katrin2010 [14]
3 years ago
11

A boy throws a baseball across a field. The ball reaches its maximum height, 18 meters, after 1 second. After approximately 2.3

seconds, the ball lands on the ground. The ball’s motion can be modeled using the function f(x) = –10x2 + 20x + 8. What is the height of the ball 1.5 seconds after it is thrown?
Mathematics
1 answer:
zubka84 [21]3 years ago
3 0
17 17 17 17 17 17 17 17 17
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5 0
3 years ago
. Mr. Donut wants to paint a donut on the wall of his restaurant. The diameter of the outside edge of the donut will be 22 inche
KATRIN_1 [288]

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Step-by-step explanation:

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Where:

A - Total area of the donut, measured in squared inches.

A_{g} - Area of the greater circle, measured in square inches.

A_{l} - Area of the lesser circle, measured in square inches.

By using the definition of the area of the circle, we expand the equation above:

A = \frac{\pi}{4}\cdot D^{2}_{ext} - A_{s} (Eq. 1b)

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A \approx 301.44\,in^{2}

The area needed to be painted is approximately 301.44 square inches.

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