Whats the value of x when the value is w

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Askateboard ramp is in the shape of a right triangle what is the height of the ramp

Taber invested money in an account where interest is compounded every year.he made no withdrawals or deposits. the function a(t)=525(1+0.05)^t represent the amount of money in the account after t years. how much money did taber origanally invested?