30 is what percent of 600?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

How do you write 600 as a product of its prime factors (index! )

Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.