Answer:
$21 the minimum Bob has to may will be the amount payed regardless of the number of passengers in the taxi
The cross section is a rectangle, because the shadowed area shows a right angle on all four sides.
Radius I think is 4
Because 8/2=4 and the diameter is 2 times the radius
Check work:
4*2=8
Have a awesome night/day
She rented it for 3 hours