Hello! I need some help :) I need to find the area of the shaded region! (And answer in terms of pi)

Ty! <3

Mindy bought 5/8 pound of almonds and a 3/4 pound of walnuts.which pair of fraction cannot be used to find how many pounds of nuts she bought in all.

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min if they did not stop driving, how many miles could kyle and elijah drive in a whole day? ? 1 day = 24 hours. plzzz i will give you 100 points

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?