What is 10,000,000 written as a power of ten?

a.
10^7

b.
10^8

c.
10^–7

d.
10^–8

After the seventh month of a 12-month loan: the numerator is: {(n + 11) + (n + 10) + (n + 9) + (n + 8) + (n + 7) + (n + 6) + (n + 5)} = , and the denominator is: {(n) + (n + 1) + + (n + 11)} = . therefore, the fraction is numerator/denominator (to the nearest tenth) = %

Can someone answer this question? : )

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps