(3x^2+3)(4+x^3) what the polynomial ?

(3x^2+3)(4+x^3)
=12x^2 +3x^5 + 12 + 3x^3
= 3x^5 + 3x^3 + 12x^2 + 12

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.