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Marizza181 [45]
3 years ago
11

The function, f(x) = 70n-400, models the profit if the instructor of a guitar class per month, where n is the number of students

enrolled in the class. How many students must be enrolled in the class for the instructor to make a profit? How many students must be enrolled in the class if the instructor needs to make $1,000.00 profit per month?
Mathematics
1 answer:
Tasya [4]3 years ago
6 0
F(x) = 1,000
70n - 400 = 1,000
70n = 1,000 + 400
70n = 1,400
n = 1,400/70
n = 20

The instructor needs 20 students
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<em>Comment on significant digits</em>

The area in problem 8 may be considered to be 192.325 m^2 if you are required to use 3.14 as the value for pi. Since that value is only good to 3 significant digits, it is quite pointless to report the answer to 6 significant digits when using that value. It is quite reasonable to use 192 m^2 for the answer, especially if you're required to round to whole numbers.

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