What is 15 thousands + 20 hundreds + 5 ones =

A newspaper reported that in one year the United States imported goods from China worth a total of 385 billion dollars. What is 385 billion written in scientific notation?

Mark wants to use a grid to model the percent equivalent of the fraction 2/3. How many grid squares should be shade? What percent would his model show?

Fran is going to transfer her credit card balance over to a new card. She has an existing balance of $752.69. Her current card charges her a transfer fee of 12.5%, added to her balance, for transferring her debt.

A statistic class has 9 boys and 11 girls. The teacher selects 3 students at random. Find probability that all are boys.

Randall bought half pound of American cheese. He used one tenth pound to make a sandwich. How many pounds of cheese did he have left?

A = 1 over 2 h (b+b); a=33, b=4, b=7

A salad recipe calls for 1 cups of chopped tomatoes. The recipe calls for 4 times as many cups of lettuce as tomatoes. How many cups of lettuce do you need for this recipe?

Write a formula for the area A of a parallelogram.

Pedro and Natalia play the trumpet. Pedro practiced 3/4 of an hour last night. Natalia practiced for 1/2 an hour. Who practiced longer?

What is the answer? Kim and Cyndi are starting a business tutoring students in math. They rent an office for $400 per month and charge $40 per hour per student.