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Svetllana [295]
3 years ago
13

 A rubber ball is dropped onto a hard surface from a height of 8 feet, and it bounces up and down. At each bounce it rises to 90

% of the height from which it fell.
a. Find a formula for h(n), the height in inches reached by the ball on bounce n.
h(n)=?
b. How high will the ball bounce on the 14th bounce? (in inches)
c. How many bounces before the ball rises no higher than an inch? 
Mathematics
1 answer:
Setler [38]3 years ago
7 0
A. 8 feet * 0.9 = distance after first bounce
h(n) = 8 * 0.9^n

b. 8 * 0.9^14 = 1.83 feet to 2 d.p.
1.83 * 12 = 21.96 inches

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You may have left something out of this.

-6x + 15 = -  69

You can do it now that you have the complete equation. But you need the entire equation before you can answer the question.

Subtract - 15 from both sides.

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But what you want is

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