Answer:
Β 36 objects
Step-by-step explanation:
You want the value of x when t=9, so you're solving ...
Β 9 = 0.007x^2 +0.003x
Β 9 = 0.007(x^2 + 3/7x)
From here, we observe that an approximation is probably sufficient.
Β 9/0.007 = x(x +3/7) . . . . . the expression on the right is nearly x^2
Β x β 3/β.007 β 35.9 β 36
We can check:
Β .007(36)(36 3/7) = 9.18
Β .007(35)(35 3/7) = 8.68
To keep the computer busy for 9 seconds, it needs to sort 36 objects.
Β
