The half-life of strontium - 90 is approximately 29 Year's. How much of a 150 g sample of strontium-90 will remain after 116 years

If 45 cookies will serve 15 students, how many cookies are needed for 90 students?

From midnight to 6 am, the temperature rose 8C. at 6am, the temperature was - 20c. what was the temperature at midnight?

Explain how to find the product of 3/7 X 7/9. Use complete sentences in your answer.

A runner, training for a competition, ran on a track every day for 10 weeks. The first week he ran 8 kilometers each day of the week. The second week he increased his daily run by one lap (400 meters).

Stacy goes to country fair with her friends the total cost of rides tickets is given by the equation c=3.5t where c is the total cost of tickets in t is the number of tickets If Stacy bought 15 tickets she would spend?

What is 7x5+9 (2x9) 2+3 (8+6) 5-=___?

You do you solve systems of equations by subsitution

Solve for b. 6b + 5a = 7b - 2a + 3 -7a + 3 7a-3 A. b = B. b = 13 13 C. b = 7a - 3 O D. b = - 7a + 3

Mr. Schwartz builds toy cars. He begins the week with a supply of 85 wheels, and uses 4 wheels for each car he builds. Mr. Schwartz plans to order more wheels once he has fewer than 40 wheels left.

I am the number that divided the dividend