NEED HELP PLS I DONT KNOW THE ANSWER

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

The value of cos 30° is the same as which of the following?

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.