Hi there! The answer is less than 36 hours of work.
Subtract 80
Divide by 5.
Therefore, the outcome will be smaller than $260, if he works less than 36 hours.
Answer:
36 objects
Step-by-step explanation:
You want the value of x when t=9, so you're solving ...
9 = 0.007x^2 +0.003x
9 = 0.007(x^2 + 3/7x)
From here, we observe that an approximation is probably sufficient.
9/0.007 = x(x +3/7) . . . . . the expression on the right is nearly x^2
x ≈ 3/√.007 ≈ 35.9 ≈ 36
We can check:
.007(36)(36 3/7) = 9.18
.007(35)(35 3/7) = 8.68
To keep the computer busy for 9 seconds, it needs to sort 36 objects.
the absolute value of -5/9, written |-5/9|, = 5/9.
Checking:-
5/ 9 = 0.55...
4/7 = 0.57
7/4 = 1.75
So C and D are greater than absolute value of -5/9.
The first gym will cost 570 a year and the second 720 you will have saved 150 a year if she goes to the first