Given:
<span>The average number of daylight hours each month in Springfield in 2015:
Jan 9.5
Feb 10.5
Mar 12
Apr 13.25
May 14.5
Jun 15
Jul 14.75
Aug 13.75
Sep 12.5
Oct 11.0
Nov 9.75
Dec 9.25
Now, we observe the trend of the monthly hours, it starts with a low value then increases and decreases back to the original value. This represents a parabola with the highest point of 15 hours. </span><span />
Answer:
x = 9 or x = 0 or x = -2
Step-by-step explanation:
Solve for x:
3 x^3 - 21 x^2 - 54 x = 0
The left hand side factors into a product with four terms:
3 x (x - 9) (x + 2) = 0
Divide both sides by 3:
x (x - 9) (x + 2) = 0
Split into three equations:
x - 9 = 0 or x = 0 or x + 2 = 0
Add 9 to both sides:
x = 9 or x = 0 or x + 2 = 0
Subtract 2 from both sides:
Answer: x = 9 or x = 0 or x = -2
Answer:
10 hours
Step-by-step explanation:
volume of lower portion = 85x125x40 = 425,000
volume of upper portion = 20x30x125 = 75,000
in 1.5 hours, the pump removed 75,000
in one hour it removed 50,000 (75000/1.5 = 50,000)
425,000 / 50,000 = 8.5 hours for bottom portion
8.5 + 1.5 = 10 hours total time for top and bottom
If we round each of these numbers Then we get a good estimation
128.2 rounds out to be 130
129.11 rounds out to be 130
132.5 rounds out to be 130
So now we just add these rounded numbers up.
130 + 130 + 130 = 390
So our answer is 390
when in doubt, eat a pineapple, trust me it helps. :)
Answer:
Step-by-step explanation:
23 and 50
