Shiela is 0.61 meters taller than her son.
Answer:
Diameter of pipe = D = 64mm
cross sectional Area of pipe= A = pi * (D/2)^2 = pi * (32)^2 = 1024pi mm^2
Discharge Rate of water = v = 2.05 mm/s
Volume of Cylinder = V = pi * (D/2)^2 * h = pi * (38)^2 * 2300 = 3321200pi mm^3
(Area of pipe)*(Rate) = (Volume) / (Time)
Time = T = (Volume) / [(Area of pipe)*(Rate)]
= (3321200pi)/(1024pi * 2.05)
= 1582.126524s
Let's use 8 days as the maximum time we are going to be renting the car.
Putting that into the equation means, 500$ for Harry's Rentals and Smilin' Sam's at $600.
Therefore, Happy Harry's Rentals are better for the 7th and 8th days while Smiling Sam's are the better from day's 1 to 6.
Work:
500$ is a fixed value so it doesn't change (constant)
200 + 50x
x = days
8 days = 8x
200 + 50(8)
200 + 400 = 600
The answer to the question is a