#2:
Find the total surface area of the capped cylinder.
2 times the area of the base would be 2[pi*(3 cm)^2, or 18pi.
The circumference of the base is C = 2pi*r, which here is 6pi.
The area of the sides is C times height, or 6pi*(11 cm) = 66pi cm^2
Add this to the 18pi cm^2 previously found.
Total area of cylinder, including top and bottom, is 84 cm^2.
The function is not invertible if you think of it as

because it is not injective: 
So, if we restrict the domain to the positive numbers only:

Note that the range is actually
, so we can be more precise and write

To find the inverse, we solve the expression for x:

But since we restricted to positive values of x, the inverse is

Answer:
70 mph it would be 8 hours and 10 minutes
Step-by-step explanation: