Whats the difference between 8.3 and 8.03

Find the zeros of the function. write the smaller solution first, and the larger solution second f(x)= (x+6)^2-49

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents