What is the missing polynomial? ?-(20-4x-5x^2) =20-7x^2

PLEASE HURRY

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

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?

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.