Answer:
a) 
b) 
Step-by-step explanation:
a) We have the following equation:
(1)
Where 
is the time is seconds, 
is the distance in meters and 
is the acceleration due gravity
If we divide numerator and denominator inside the square root by 2:
We will have:
Hence:
b) Using the same equation (1) with thw following data:
We will have the reaction time:
You can’t make another Square because you can’t multiply number that give you 23
Answer h=-80
vvv STEP BY STEP vvv
Multiply both sides of the equation by
52-h=28
Move constant to the right-hand side and change its sign
-h=28+52
Add the numbers
-h=80
Change the signs on both sides of the equation
h=-80
Answer Q=-11
Explanation is in picture below
