Answer:
The radius is 20.4
Step-by-step explanation:
Since the circumference is equal to pi ( \pi ) times the diameter you divide 13 by pi and you end up with 40.84. The radius is half of the diameter soy ou divide by 2 and you get 20.4
Let r be the rate at which oil production is decreasing from the well. Then:
5000000 x r^6=2500000
r^6=.5
ln r^6=ln .5
6 ln r=-0.69314718055994530941723212145818
ln r=-0.11552453009332421823620535357636
r=e^-0.11552453009332421823620535357636=.891
Since the oil production is only 0.891 of the previous year, the annual rate of loss is 0.109, or 10.9%, growing annually
A.3000000=5000000x(.891)^t
.6=0.891^t
t=4.42 years
Oil is being pumped at .60 of original production
B.250000=5000000 x 0.891^t
.05=.89^t
t=25.96 years
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Answer:
x=15
Step-by-step explanation:
4x+28+x+19+3x+13=180
8x+60=18
x=15
all angles of a triangle = 180
Explanation:
Differentiating the solution, we have ...
y' = c1 +8c2x^7
y'' = 56c2x^6
Putting this into the DE, we have ...
x^2y'' -8xy' +8y = 16 . . . . . . . different from your problem statement
x^2(56c2x^6) -8x(c1 +8c2x^7) +8(c1x +c2x^8 +2) = 16
56c2x^8 -8c1x -64c2x^8 +8c1x +8c2x^8 +16 = 16
x^8(56c2 -64c2 +8c2) +x(-8c1 +8c1) +16 = 16
0 +16 = 16 . . . . QED
