The half-life of a radioactive substance is 245 days. How long will it take for 79 grams of the substance to decay to 43 grams?

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

Calculate the effective quarterly compound interest rate equivalent to a 1% of monthly compound interest rate.