The instructor wants the profit to be positive, so
f(n) > 0
70n -400 > 0
n - 400/70 > 0
n > 5 5/7
The instructor must enroll at least 6 students to make a profit.
Answer:
Well the divisibility rule for 22 is that the number must be divisible by 2 and 11. In order for something to be divisible by 2 it needs to end in 0, 2, 4, 6, or 8. For the number 11 the, if the difference between the odd numbered digits and the sum of the even numbered digits is a multiple of 11 then it is divisible by 11.
So I would say no for both of them since 22 is divisible by 11.
Please let me know if I'm wrong.
Answer:
15
Step-by-step explanation:
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