First you must add up all of the numbers. Then divide the sum by the number of students in the class. You will get 2.65 as your answer. Then round to the nearest number. Your final answer is 3.
Gotta graph this one
Zeros are $.586 and $3.414 and the profit is zero when these are the prices
Maximum profit when the dogs are 2 bucks
I would compute sqrt(1 + 160pi^2) first to get approximately 39.75093337
Add this to 1 and we have 40.75093337
Then divide over 2pi to get a final approximate result of 6.48571248
So x = 6.48571248 is one approximate solution
In short, I computed 
only focusing on the plus for now.
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If you were to compute 
you should get roughly -6.167402596 as your other solution. Each solution can then be plugged into the original equation to check if you get 0 or not. You likely won't land exactly on 0 but you'll get close enough.
If u can message me on my profile, I can help you
To solve this problem simplify 9/2 widgets to 4.5. Next, multiply that number by 6. (1/6*6=I full hour).
The answer is 27.
