I need help! This is for a Test, and I cant figure out the answer. A scuba diver dove 40 feet below the surface.
He swam up 12 feet to see a unique fish.
He followed the fish down 8 feet.
Then he followed the fish up 27 feet.
How far below the surface is the diver now?

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?

How many quarts of a 50% solution of acid must be added to 20 quarts of a 20% solution of acid in order to get a 40% solution of acid?

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.