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Andrews [41]
3 years ago
9

14% of 980?

Mathematics
1 answer:
Natasha2012 [34]3 years ago
8 0
137.2
30
$298.30
390
5970
3050
16
150
5500000
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Sand falls onto a conical pile at the rate of 10 cubic feet per minute. The radius of the pile is always equal to one half it al
Andreas93 [3]

Answer:

Either one of these.

Step-by-step explanation:

volumepile=1/3 (PI r^2)h

but r=h/2, so

volume=1/12 PI h^3

dv/dt=10 ft^3/min

but dv/dt=1/12 PI 3h^2 dh/dt

solve for dh/dt

This assumes you mean by "altitude" the height. If you mean altitude as slant height, you have to adjust the fromula

_______________________________________________

given: r = h/2

V = (1/3)π r^2 h

= (1/3)π (h/2)^2 (h)

= (1/12) π h^3

dV/dt = (1/4)π h^2 dh/dt

for the given data ...

10 = (1/4)π(25)dh/dt

dh/dt = 10(4)/((25π) = 1.6/π feet/min

3 0
3 years ago
NEED HELP ASAP!! NO LINKS!!! OR U WILL BE REPORTED!! WILL GIVE BRAINIEST!!
Afina-wow [57]

Answer:

Y = 6,8          X = -6,3           Z = -2, -1

Y = 9,7           X = -3,2          Z = 1,-2

Step-by-step explanation:

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3 years ago
Please help!............
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The answer for your question is B. 5
7 0
2 years ago
Which of the following is the function representing the graph below?
horsena [70]
That's a hard one either c or d
7 0
3 years ago
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Please help, been stuck on this question for a while
vichka [17]

Answer:

csc (- Ф) = -29/20

Step-by-step explanation:

We know that:

csc Ф = 1/ sinФ ................. equation 1

csc (- Ф) = - csc Ф .............equation 2

Given that:

sin Ф = 20/29

Using equation 1:

csc Ф = 1/ (20/29)

csc Ф = 29/20

using equation 2:

csc (-Ф) = - csc Ф = -29/20

I hope it will help you!

3 0
2 years ago
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