Answer:
$28.
Step-by-step explanation:
p(x) = -2(x - 9)^2 + 100
If the prices (x) = 15 dollars we work out the profit by substituting x = 15 in the above formula:
p(15) = -2(15 - 9)^2 + 100
= -2 * 6^2 + 100
= $28.
4 rows and 875 columns, or 875 rows and 4 columns
2(5x + 2)^2 = 48
divide both sides by 2
(5x + 2)^2 = 24
square root both sides to clear the power of two.
5x + 2 = + - sqrt24
subtract 2 from both sides
5x = -2 + - sqrt 24
divide both sides by 5
x = (-2 +-sqrt24)/5 or decimal answers .58 and -1.38
Divide total miles by speed to get how long it will take to drive:
569 miles / 65 mi/h = 8.75 hours.
Now subtract the time it takes to drive from the total time you can travel:
9.5 hours - 8.75 hours = 0.75 hours.
You can stop for 0.75 hours.