A small refreshment stand at the beach sells cans of pop to thirsty people. The number of customers that visit the stand each day is based on the temperature outside. This is modelled by the function C(T) = -0.05(T – 25)² + 30 , where C is the number of customers and T is the temperature (in °C). The average number of beverages that each customer orders, B, is also based on temperature, according to the function B(T) = 1.047. Consider the function A(T) = C(T) × B(T). a) What are the units of A(T)? Explain the meaning of this function.

Given the function defined by f(x)=13+x​, find f(−9).

The digital music industry has been growing steadily since the 2000s. The function h represents the percentage of music sales that are digital as a function of the number of years since 2002, t. h(t) = 15.8182+49.91t %3D 17.0418+0.52t

y ALGEBRA Find the values of x and y. 19. 20. -(6x - yl° (4x + yl (17х - ур 40° 28 130 (12x + 4 y)°