Gold is often used with other metals, such as copper and zinc, to make jewelry. Approximately 58% of the mass of a certain 40 gram necklace is gold. The density of gold is 19.3 grams per cubic centimeter. What is the volume of gold, to the nearest tenth of a cubic centimeter, in the necklace?

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb

perimeter of the base times height

step-by-step explanation:

55 degrees because 55+55=110 degrees