Iodine-125 has a half-life of about 60 days.

How many milligrams of a 500 mg sample will remain after 300 days?

1. 0.6 mg

2. 7.8125 mg

3. 15.625 mg

4. 31.25 mg

Given that there is a 23% chance it will rain on any day, what is the probability that it will rain on the first day and be clear (not rain) on the next two days?

Solve the equation. x - 7 = 6 (2x + 3) - 14 x =

What's 15x - 25 + 2 = 22 (with steps)

Solve each equation. Check your solution. 7a+10=2a

Find the quotient of 1,644 and 4 mentally using place value

Henry rented a truck for one day. There was a base fee of $17.95, and there was an additional charge of 71 cents for each mile driven. Henry had to pay $144.33 when he returned the truck. For how many miles did he drive the truck?

Willow is starting a big business for her class. A bake sale! Rachel, Lana, Sara, and Josephine are also participating! Rachel needs 1/2 more cups of yeast to make the challah. Lana needs 1 1/2 cups more flour to make the fortune cookies.

Determine which answer is reasonable to 4.8 times 9.2 A. 14 B. 45.36 C. 432 D. 470.4

Tia was flying her model airplane. it took the airplane 5 seconds to go 90 feet. what was the average rate of speed of the model airplane, in feet per second?

Suppose the length of the prism is doubled how does the volume change explain your reasoning