Is 12.89 a irrational number

Lucinda leaves money in her savings account for 8 years. She started with $800 and earned 3.5% interest compound annually. How much money is in her account?

Marc is decorating 60 cupcakes for a school fund-raiser. He starts working at 1:00 P. M. In the afternoon, first setting up his supplies and then starting to decorate. At 1:05 P. M. He has 5 cupcakes decorated. At 1:08 P. M.

The perimeter of a triangle is 26 centimeters. Side a of the triangle is 3 centimeters longer than side b. Side c is 1 centimeter shorter than twice side b. Find the length of each side.

Haley jogged 1.5 kilometers in the morning and 2.8 kilometers in the afternoon. How far did she jog that day

Find the missing element in the following base-rate-percentage problem. 12% of what number is 42?

Use the line tool to graph the equation 2x+3y=9.

If a microscope has a 10x ocular lense and the total magnification at a particular time is 950x the objective lense in use at that time is

Mars inc. says that until very recently yellow candies made up 20% of it's milk chocolate m&m's, red another 20%, and orange, blue, and green 10% each. the rest are brown.

How to write 4 greater than x in a equation

What is the sum of the first 20 terms in the arithmetic series? -6 + (-2) + 2+6 + ... 624 640 654 680