Each construction block is 12 inches wide, 15 inches long, and 5 inches tall. What is the surface area of each block?​

Write an inequality and solve each problem. for exercises 11 and 12, interpret the solution.

Find the quotient with the restriction.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.