First you have all ten books, but then every time after, you loose one because you can't put the same book in the group twice.
10 * 9 * 8 * 7 = 5040 groups
35+15x=410
410-35=375
375/15=25
He will need to work 25 weeks.
Factor out the greatest perfect root factor The root of a product is equal to the product of the roots of each factor Reduce the index of the radical and exponent with 4 = 0.00380546
M=FD^2/(-Gn)
here is the solution
2 because it's the highest exponent in the expression
