The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 150 grams of a radioactive isotope, how much will be left after 3 half-lives?

Bobby borrowed $500 at 12 percent simple annual interest. He paid back $680 to pay off the loan. How many years did it take Bobby to pay back the loan?

Solve x+12/x+4=*/x+8

The sum of two numbers is 57 and the difference is 13 what are the numbers

Which, if any, of the following statements are true?. Check all that apply. a. The stronger the base, the smaller the KbKb. b. The stronger the base, the larger the pKbpKb. c. The stronger the base, the smaller the pKbpKb. d.

A treasure chest sinks at a rate no less than 20 feet per second. The floor of the ocean is at most at - 4,200 feet. Will the treasure chest reach the ocean floor in less than 3 minutes? Explain.

What percent of 140 is 3?

Joy is planning to purchase a sweater that costs $30 dollars at her local department store. The sweaters are on sale for 20% off. Which steps are needed to find the sale price of the sweater? A. Convert the percent to its decimal equivalent.

Positive numbers are located to the left of zero on the number line. True False

Doug entered a canoe race. he rowed 3 1/2 miles in 1/2 hour. what is his average speed in miles per hour?

Your job is to design a open topped, rectangular box of minimum cost. Suppose the box is to be of volume cubic cm;