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A bouncing ball reaches a height of 54 inches at its first peak, 36 inches at its second peak, and 24 inches at its third peak. Which formula represents this scenario?

Which sequence can be generated from the formula f(x + 1) = One-half(f(x))?

2 Answers

4 votes

Answer:

The height of the bouncing ball appears to be decreasing by a factor of one-half each time it bounces. We can model this situation with an exponential decay function of the form:

h(t) = a * (1/2)^t

where h(t) represents the height of the ball at time t, a represents the initial height of the ball (in inches), and t represents the number of bounces.

Using the given data, we can set up a system of equations to solve for a:

h(0) = a = 54 (initial height)

h(1) = a * (1/2)^1 = 36 (height at second peak)

h(2) = a * (1/2)^2 = 24 (height at third peak)

Solving for a, we get:

a = h(0) = 54

a * (1/2)^1 = 36

a * (1/2)^2 = 24

Multiplying the second equation by 2 and the third equation by 4, we can eliminate the fractions:

a = 54

a * 1 = 72

a * 4 = 96

Solving for a in the first equation, we get a = 54. Therefore, the function that represents the height of the ball after t bounces is:

h(t) = 54 * (1/2)^t

To generate a sequence from the formula f(x + 1) = One-half(f(x)), we can start with an initial value for f(0) and use the formula to generate subsequent terms. In this case, we can use the formula with f(0) = 1 to generate the sequence:

f(1) = 1/2

f(2) = 1/4

f(3) = 1/8

f(4) = 1/16

and so on.

Each term in the sequence is half the value of the previous term, so the sequence is decreasing exponentially.

User Eranga Kapukotuwa
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7 votes

Answer:

The formula that represents this bouncing ball scenario is f(x) = 54 x 2^(-x). This formula can be used to generate a sequence of numbers that are half of the previous number in the sequence, such as 54, 27, 13.5, 6.75, 3.375, and so on.

User Geoaxis
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6.8k points