Is the following a power function, a polynomial, both, or neither? f(x)=19x10

An equation where variables are used to represent known values—function notation true or false

Don't know how to find x given these segment lengths

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 (monthly car loan payment per $1,000 borrowed) i need !