Slove it step by step

Find the total area for the regular pyramid ( follow the answer set up in the picture)

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6