An element with a mass of 630 grams decays by 30% per minute. To the nearest minute, how long will it be until there are 30 grams of the element remaining?

Jack lives on a farm and has a large backyard. the area of his rectangular backyard is of a square mile. if the width of the yard is of a mile, what fraction of a mile is the length of the rectangular backyard?

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12