In 8,574.1 which digit is in the tenths place

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

What is coefficient of the term of degree of degree 5 in the polynomial below