SOLUTION: A diver jumps from a springboard. The function h(t) = −5t² + 8t + 4
shows the height of the diver above the water, in meters, t seconds
after the diver leaves the springboard.
Question 1206027: A diver jumps from a springboard. The function h(t) = −5t² + 8t + 4
shows the height of the diver above the water, in meters, t seconds
after the diver leaves the springboard. What time, in seconds, did the
diver start his descent?
Ⓐ 0.4
Ⓑ 0.8
Ⓒ 2
Ⓓ 4 Answer by ikleyn(52776) (Show Source):
You can put this solution on YOUR website! .
A diver jumps from a springboard. The function h(t) = −5t² + 8t + 4
shows the height of the diver above the water, in meters, t seconds
after the diver leaves the springboard. What time, in seconds, did the
diver start his descent?
Ⓐ 0.4
Ⓑ 0.8
Ⓒ 2
Ⓓ 4
~~~~~~~~~~~~~~~
The diver starts his descent at the highest point, so we need find the vertex
of the parabola
= , where a= -5 is the coefficient at t^2;
b= 8 is the coefficient at t.
= = = 0.8 seconds. ANSWER
