A dolphin at a depth of -64 meters, ascends to the depth of 90 meters and then descends to a depth of 84 meters. At what depth did the dolphin end at?

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it. how many multiple-choice questions are on the test?

15/16 as a decimal rounded to the nearest hundredth

Bernice paid $162 in interest on a loan of $1800 borrowed at 6%. how long did it take her to pay the loan off?