On the first day of spring, an entire field of flowering trees blossoms. The population of locusts consuming these flowers rapidly increases as the trees blossom.
The relationship between the elapsed time, ttt, in weeks, since the beginning of spring, and the total number of locusts, N(t)N(t)N, left parenthesis, t, right parenthesis, is modeled by the following function:
N(t)=300⋅(4916)t
Complete the following sentence about the rate of change of the locust population. Round your answer to two decimal places.

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?