What is the value of f(3) in the function below? f(x) = 2^x a. 6 b. 8 c. 4 d. 16

Me! 50 points! why does when we come home, our door is unlocked and there is grease on the door knob, me solve this , and i don't know what category this goes under

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?