Strontium-90 has a half-life of about 28 years. After 112 years, how many grams of a 50 g sample will remain?

a. 3.125 g

b. 6.25 g

c. 12.5 g

d. 42.0 g

What is the side lanth of a square whose area is 40 sqwuare inches

Megan bought 6 kilograms of dried blueberries for $27. Which of the following is an equivalent rate?

Suzie bought 18 sponges. There were s sponges in each package. Write an expression that shows how many packages Suzie bought. Type an asterisk (*) if you want to use a multiplication sign and a slash (/) if you want to use a division sign.

A rectangular room has a perimeter of 70m and is 20m long write an equation to represent the area

If i stands for income and e stands for expenses, what is the formula for p, profits?

A certain forest covers an area of 2500 km2. Suppose that each year this area decreases by 5.25%. What will the area be after 15 years? Use the calculator provided and round your answer to the nearest square kilometer.

Use the formula V = s³, where V is the volume and s is the edge length of the cube, to solve this problem. A cube-shaped container has an edge length of 23 feet. What is the volume of the container?

Dimitrus returned 5 library books last week, returned 3 books this week, and then checked out 8 more books. He now has 12 library books. How many books did he have before last week

Robin used 1/4 of a pound of butter to make a cake. Before she started, she had 7/8 of a pound of butter. How much butter did Robin have when she was done baking? Give your answer as a fraction of a pound.

The height of a building is 1734 ft. How long would it take an object to fall to the ground from the top? Use the formula s equals 16 t squared , where s is the distance, in feet, traveled by an object falling freely from rest in t seconds.