Someone solve question b with working really stuck much appreciated!

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:

i assume that by 5 you mean 5 gallons.

(20)(0.25) = 15

removing 15 gallons reduces the tank from 20 to 5.

it has the same slope and a different y-intercept

hope this : )