Vicki and tamra are working on their math homework together. vicki has worked p problems and tamra has worked 5 times as many as vicki. the expression shows how many problems they have worked altogether. p + 5p which of the following expressions could be used to get the same results? a. 6p2 b. 6p c. p + 6 d. p + 5

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.