1.) Determine whether the given algebraic expression is a polynomial. If it is, list its degree, leading coefficient, and constant term.

(6t^12+17)(7t^82)

Group of answer choices

Polynomial of degree 20; leading coefficient 42; constant term -34

Polynomial of degree 96; leading coefficient 13; constant term 15

Polynomial of degree 20; leading coefficient 7; constant term 34

Not a polynomial

Polynomial of degree 96; leading coefficient 42; constant term -34

2.) Find all real roots of the polynomial

u^47u^2+66u120

List the roots from least to greatest.

u=

3.) Determine whether the polynomial x25x+12 is a factor of x3+3x210x24.

yes or no?

4.) The number of cases of COVID-19 in the US can be modeled by the function C(t)=30(1.75)t where t is time days and t=1 on March 1st, 2020.

Find and interpret the average rate of change of C(t) over the interval [2,7].

Round the answer to the nearest whole case.