Answer:
(a) At 1.5 seconds, the ball is 15ft high
Explanation:
Given
![Fence:= 20ft](https://img.qammunity.org/2022/formulas/mathematics/college/wvtsdbbrs7xgr2y4f4z1r63h4jdfll9ut6.png)
![h(t) := -16t^2 + 30t + 6](https://img.qammunity.org/2022/formulas/mathematics/college/u0scv5vlrldol1x0vs320f6qbj1d1aun4t.png)
Required
Select the true statement
See attachment for options
Option (a): At 1.5 seconds, the ball is 15ft high
This implies that:
![t = 1.5](https://img.qammunity.org/2022/formulas/mathematics/high-school/xbhqvf68sresyu0zuuh8s9r6p6mcn72a4m.png)
Substitute
in
![h(t) := -16t^2 + 30t + 6](https://img.qammunity.org/2022/formulas/mathematics/college/u0scv5vlrldol1x0vs320f6qbj1d1aun4t.png)
![h(1.5) = -16 * 1.5^2 + 30 * 1.5 + 6](https://img.qammunity.org/2022/formulas/mathematics/college/jzk9dsjvkkwkrnawvq8q2o9icmrb5eda62.png)
![h(1.5) = -16 * 2.25 + 45 + 6](https://img.qammunity.org/2022/formulas/mathematics/college/unzwvk6tjv9rj7uvhi64li0i7tsgwajmjb.png)
![h(1.5) = -36 + 45 + 6](https://img.qammunity.org/2022/formulas/mathematics/college/q2btk0tctslx3vouelectwqttnoklddbbp.png)
![h(1.5) = 15](https://img.qammunity.org/2022/formulas/mathematics/college/eotdv41im63ypoi0ppioj3i65j4ky11z91.png)
This statement is true.
Because:
means that:
At 1.5 seconds, the ball is 15ft high
Other options will not be checked because only one option can be correct