The cost, in dollars, per watt of solar energy is a function of the number of years since 1977, t. The cost could be modeled by an exponential function f. Here is the graph of the function. image

What is a reasonable domain for the function?

A.
t > 0

B.
t < 80

C.
[0, 10]

D.
[0, 80]

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.

Item 1 solve for s. s+24=90 −114 −66 66 114

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?