A sphere has a radius of 4 inches. Determine the effects on the surface area and volume of a sphere when the radius is changed. ITEM BANK: Move to Bottom the surface area is divided by 16the surface area is divided by 4the surface area is multiplied by 4the surface area is multiplied by 9the volume is divided by 64the volume is divided by 8the volume is multiplied by 27the volume is multiplied by 8 radius is doubled radius is tripled radius is divided by 2 radius is divided by 4

Use addition and subtraction to simplify the following polynomials. a. add polynomials: (3 – 4x + 8x^2) + (–6 + 2x – 5x^2) step 1: rewrite the polynomials without the parentheses. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial. b. subtract polynomials: (3x – 5 – 7x^2) – (–2 + 6x^2 – 5x) step 1: rewrite the polynomials without the parentheses. remember to multiply each term in the second parentheses by –1. show your work. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial.

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

Need on this geometry question. explain how you did it.