Krypton-85 has a half life of 11 years. If a scientist has 500 grams of Krypton-85 in her lab and she decides not to use any for her experiments how much will remain after 50 years? (round to the nearest gram)

How many times will 70 divide by 2

3x + y = - 4 -6x - 4y = 14

Write a number in each of these boxes so that the mode of the five numbers is 11

Sally will earn $30 for every 5 hours that she babysits. Which of the following equations can be used to represent the proportional relationship?

7 (x+5) = 4 (x+8) + 6

What number equals 100 when squared?

What are the zeros of f (x) = x^2-8x+15

What is the average speed on a car that travels 800 kilometers in 20 hours?

Solve the following equation. Then place the correct number in the box. 3x + 1 + 5x = 7 + 15 = 7x X =

Party favors are on sale for $2.40 each. You have $380 to spend on the decorations and gifts, and you have already spent $270 on decorating. Write and solve an inequality to find the number of party favors you can buy.