The average monthly bill for wireless telephone subscribers from 1985 to 2008 can be modeled by B(x) = -1323x98.072, where x is the number of years after 1980. If this model remains valid, in what year will the average monthly bill be $45.15?

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

If there are 3.281 feet in 1 meter, how many inches are in one centimeter

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.