What is (3.2x10 the 13th power) + (2.5 x 10to the 11th power)

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

I'm confused on this could anyone me and show me what i need to do to solve it.

Someone answer asap for ! a ball is rolled down a ramp. the height, f(x), in meters, of the ball x seconds after it is released is modeled by the function f(x) = x²- 10x + 25 for all values of x from 0 to 5. which statement about the ball is true? a. the maximum height of the ball is 5 meters b. the height of the ball increases from 0 to 5 meters above the ground. c. the ball has traveled 5 meters when it reaches the bottom of the ramp. d. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp