1. kim and cyndi are starting a business tutoring students in math. they rent an office for $400 per month and charge $40 per hour per student. if they have 15 students each for one hour per week how much profit do they make together in a month? (assume 4 weeks per month)

$40 per hour
15 students per week
Each hourly student earns them $40 and there are 15 students, so this is multiplication.
40 * 15 = 600 per week
There are 4 weeks per month to earn 600 each week, this is again multiplication.
600 * 4 weeks = 2400 per month 
Out of their earned 2400 they must pay for their overhead, the building rent
2400 - 400 = 2000 profit 
They are left with $2000 between them.

If you divide 0.1 and 0.6 you wii get 0.166666 which rounds to .167 which is answer b

Cis the correct answer choice