Jane writes numbers on 4 cards.

The number has rubbed off the last card, but she knows that the mean of the numbers is 15

13 22 11

What number was on the 4th card?

The half-life of sodium-22 is 2.6 years. A sample contains 800 mg of this isotope. Which expression represents the mass of sodium remaining after h half-lives? S = 0.5 (800) h S = 800 (0.5) h S = 8000.5h S = 800h + 0.

Sue has four pieces of wood the wings of her pieces of wood or 1/3 foot 2/5 foot 3*4 1/4 foot which piece of wood is the shortest?

It takes 1 week to fill 5 crates how many weeks does it take to fill 300 crates

Nan and Santo are designing a coffee table using 4 inch tiles. Nan uses 30 tiles and Sato uses half as many how many. how many total tiles did they use? If the area of the table is 36 inches by 24 inches, will they have enough to cover the table?

Find the value of expression using the order of operations 3 divided 7 times 6 divied 3 equal 4

How long will it take a seal swimming at a speed of 8 miles per hour to travel

Write 2 irrationals between 0.1 AND 0.12

I am the product of 30. two of my factors are 2 and 3. what are my other factors?

The base area of a triangular prism is 65.64 square inches. Determine the volume if its lenght is 5.9 inches

Humma has 3 apples. she slices each apple into eights. how many 1/8 apple slices does she have?