I only know B
Answer
X= 1 over 7 hj + 27 over 7
Answer:
most likely C) 4.8 cm
Step-by-step explanation:
1.
volume of cone=(1/3)hpir^2
h=6
r=9
v=(1/3)6pi9^2
v=2pi81
v=162pi
3.14=pi for problem
162 times 3.14=508.68
answer is D
2. 2=r, 24=h
v=(1/3)24pi2^2
v=8pi4
v=32pi
answer is D
3. 10=h
4=r
v=(1/3)10pi4^2
v=(1/3)10pi16
v=(1/3)160pi
v=(160/3)pi
answer is C
4. 9=h
3=r
v=(1/3)9pi3^3
v=3pi9
v=27pi
pi=3.14
v=84.78
84.8 is answer
5. d/2=r12/2=6=r
r=6
h=12
v=(1/3)12pi6^2
v=4pi26
v=144pi
pi=3.14
v=425.16
v=425.2
answer is 425.2
ANSWERS
1. D
2. D
3. C
4. 84.8
5. 425.6
Answer:
59.2 m
Step-by-step explanation:
The tangent of the angle of elevation will be the ratio of pole height to distance from the pole:
tan(2α) = h/10
tan(α) = h/70
The double-angle formula for tangents tells us ...
tan(2α) = 2tan(α)/(1 -tan(α)²)
Multiplying by the denominator and substituting from above, we get ...
(1 -(h/70)²)(h/10) = 2(h/70)
7(1 -(h/70)²) = 2 . . . . . . . . multiply by 70/h
1 - 2/7 = (h/70)² . . . . . . . . divide by 7, subtract 2/7-(h/70)²; next: square root
h = 70√(5/7) ≈ 59.2 . . . . meters
The height of the top of the pole is about 59.2 meters above the observer.
Answer:
50%
Step-by-step explanation:
B=25
50 divided 25= 2
100 divided by 2 =50
so 50%