The half-life of a radioactive kind of europium is 9 years. How much will be left after 18 years, if you start with 40 grams of it?

Write x is double than y

A mouse makes itself a nest every two weeks and uses 8 large leaves to line each nest. How many leaves will the mouse have used after 6 weeks

An even number divided by an even number cab be a/an: 1. even number 2. odd number 3. mixed number a. 1 only b. 2 only c. 1 and 2 only d. 1 and 3 only e. 1, 2, and 3

Heather plans to invest $5,000 for 8 years. Capitol Bank offers an 8 year CD at an annual rate of 5% using simple interest. How much is his invest worth at the end of the 8 years?

A local university accepted 2,300 students out of 4,500 application for admission. What was the acceptance rate, expressed as a percent.

A stack of boards is 21 inches high. Each board is 1 and 3/4 inches thick. How many boards are there?

There are 90 students in Grade 5, and 10% of them were absent today. In Grade 6, 15% of the 80 students were absent today. What was the total number of students in the two grades who were present today?

Solve for x: 4 (3x + 12) = - 36 x =

Write two inequalities to compare - 9 and - 6

Which triangle is a 30°-60°-90° triangle? Mark this and return