An element with a mass of 930 grams decays by 15.6% per minute. To the nearest tenth of a minute, how long will it be until there are 70 grams of the element remaining?

If 1 km = 0.621 miles, how many miles are in a centimeter

Which of the following expressions is equal to 2x^2+8

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]