5. John buys a water tank from a company that likes to use exponents as dimensions. The tank he buys has the dimensions b2 by b4 by 4c3. Which of
the following expressions represent the volume of the water tank?
A 4b8c3
B 4bc3
12b8c3
D 2bc3

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Which is an x-intercept of the graphed function? (0, 4) (–1, 0) (4, 0) (0, –1)