Jeff and Clara own different dog-washing salons. Jeff washed 10 dogs the first day and 4 dogs each day after that. Clara washes 8 dogs the first day and 4 dogs each day after that. How many dogs will each wash after 5 days? A.
Jeff will wash 24 dogs, and Clara will wash 26 dogs after 5 days.

B.
Jeff will wash 44 dogs, and Clara will wash 36 dogs after 5 days.

C.
Jeff will wash 36 dogs, and Clara will wash 44 dogs after 5 days.

D.
Jeff will wash 26 dogs, and Clara will wash 24 dogs after 5 days.

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.