$\"\"$

Find the interval of possible angles of the ball needed to clear the net.

The maximum height a skier can reach $\"\"$ , where $\"\"$ is the acceleration due to gravity $\"\"$ .

Here, $\"\"$ meters, $\"\"$ , and $\"\"$ .

Substitute the corresponding values in $\"\"$ .

$\"\"$

Therefore. the skier $\"\"$ s initial speed was 11.65 meters/second.

$\"\"$

The function $\"\"$ .

Substitute $\"\"$ , $\"\"$ , and $\"\"$ in $\"\"$ .

$\"\"$

Therefore, the time it took the skier to reach the maximum height was about 1.0008 seconds.

$\"\"$

a.The skier $\"\"$ s initial speed was 11.65 meters/second.

b. The time it took the skier to reach the maximum height was about 1.0008 seconds.