Can someone help with this thanks

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

How much orange juice do you need to make 2 servings of lemony orange slush?

What are the domain and range of the function f(x)=2^x+1