I think it’s $7.74. Hope this helps
8x+28-2
The answer is 8x+26
Your picture has several issues.
- x is not defined. It appears to be the number of apartments rented.
- R(x) is defined two different ways. The first way, it looks like it is the revenue from a single apartment. The second way, it looks like it is the revenue from the entire apartment complex.
- The derivative is in error. It should be -20x +2000. In any event, this is not the derivative you want. You're not trying to maximize revenue; you're trying to maximize profit.
- It might be useful to write an equation for profit: P(x) = R(x) -200x = -10x² +1800x. Then when you go to maximize it, your derivative will be P'(x) = 0 = -20x +1800 ⇒ x = 90.
Your answer is correct, but the path you followed to get there has a few potholes.
Answer:
516 students preferred pizza
Step-by-step explanation:
To solve this problem we have to calculate 60% of the total students (860)
To get the percentage of a number we have to divide by 100 and then multiply by the number it indicates, in this case 60
860 %60 = 860 / 100 * 60
860 / 100 * 60 =
8.6 * 60 = 516
60% of 860 is 516
this means that for Friday lunches 516 students preferred pizza