The half-life of a certain element is 100 days. How many half-lives will it be before only one-eighth of this element remains?

2

3

8

12.5

What is the area of the figure? Base:12 m Hight:5 m width: 2 m

Solve the following automotive-services problems based on the examples shown previously. Choose the correct answer. In first gear, or low gear, an automobile's engine runs about three times as fast as the drive shaft.

A caterpillar crawls 25 inches in one minute. How far can it crawl in 4.5 minutes?

Which equation could be used to create the data shown in the table? y = 4x + 1 y = 5x y = 5x + 1 y = x + 4 table x y 1 5 4 17 5 21 7 29 9 37

Which expressions are equivalent to 3 (x + 3y + 2x - y) ?

In a class of 777, there are 333 students who have done their homework. If the teacher chooses 333 students, what is the probability that none of the three of them have done their homework?

samantha can make 36 cookies each hour. write an equation to find the total number of cookies c that she can make in h hours.

Sam retirement savings account pays 7% annual interest compound monthly. He invests $15,000 in the account when he is 25 years old. How much will he have for retirement when he is 65?

Which value of x is a solution for the inequality 4 - 5x < - 6 a. - 3 b.-2 c. 2 d. 3

If you borrow $675 for six years at a interest rate of 10% how much interest will you pay