The perfect squares, 1,4,9,16,25, ..., are closed under what?

A: addition

B: multiplication

C: square-rooting

D: none of these

A tennis lesson lasts from 9:00 a. m. to 10:00 a. m., and should include an 8-min break with equal time before and after the break. At what time should the break start?

Sn=3-8n geometric series or arithmetic series?

The quotient of b and - 2 is 3.4

Use a tree diagram to fine the sample space if a coin is flipped three times. How many possible outcomes are there?

The greenhouse effect occurs on many planets. if the actual temp of venus is - 40 degrees, and the temp of the greenhouse is 800, what is the difference?

A rectangular park has a width of 8/9 of a mile and a length 3/5 of a mile. Find the area of the park. Write your answer in simplest form, using a complete sentence explain your answer.

A female grey whale is 2 times as long as a female killer whale. A female killer whale is 7 meters long. How long is a female grey whalevin centimeters?

Raina's fish tank has 17 liters of water in it. She plans to add 5 liters per minute until the tank has more than 52 liters. What are the possible numbers of minutes Raina could add water? Use t for the number of minutes.

You walk 20 meters north, then 5 meters south. what is your displacement? a. 15 meters b. 25 meters c. 15 meters north d. 25 meters north

Two times a number plus 5 equals 25. What is the number?