The sequence 6, 18, 54, 162, … shows the number of pushups kendall did each week, starting with her first week of exercising.
(a) what is the recursive rule for the sequence?
(b) what is the iterative rule for the sequence?

The table shows the distance traveled over time while traveling at a constant speed.

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|