20 ! word problem: marlon challenged her best friend, lauren, to make a list of all the four digit numbers she could think of that have the digits nine, seven, five, and one. how many numbers should lauren find? show work:

Find the area of the regular hexagon if a side is 20 cm.

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio