Vertex of y= -2(x+2)^2 + 4

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4πr^2. write your answer in scientific notation.