An airplane on autopilot tool 5 hours to travel 3,615 kilometers. what is the unit rate for kilometers per hour?

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?

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

E. which of the following is not a possible probability? a. 25/100 b. 1.25 c. 1 d. 0