A snowstorm began at noon, and snow had fallen at a constant rate per hour. If the depth of the snow was 21 inches at 5 o’clock in the afternoon and 33 inches at 9 o’clock at night, how much snow was on the ground BEFORE the snowstorm began? If the snow continues falling at the constant rate, how much snow will there be if the snow stops at 2 o’clock in the morning?

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Which expression is equivalent to sq-80

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?