Given a sphere with radius r, the formula 4π gives
a. the volume
b. the surface area
c. the radius
d. the cross sectional area

Which shows the pre image of triangle xyz

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.

20 points plus brainliest andwer plus my hover hoard im v desperate ! evaluate the polynomial for x=-2 in the equation -3x^3+7x^2-7x-1 (simplify your answer)