Consider the series 2 - 4 + 8 .. find the sum of the first 10 terms

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

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?

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?