Using the formula c = 2πr, how would i find the circumference of a circle with diameter of 28 inches. and i have to round the asnwer to the nearest inch

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10