Zinc has a density of 0.258 lb/in³ (pounds per cubic inch).

darius is making a pyramid out of solid zinc. the pyramid has a square base 6 inches on each side, and a height of 2.5 inches.

how many pounds of zinc does he need?

show all your work. do not round the final answer.

For this case we have that by definition the mass is given by:

Where,

The volume of a pyramid is given by:

Where,

Substituting values we have:

We now calculate the mass:

he needs 7.74 pounds of zinc

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450