If I wakes for 1/2 an hour, walks for 1/3 of an hour, and jogs for 1/4 of an hour. Calculate how many minutes i exercises.

please someone help me this is for a test ​

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.