1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elza [17]
3 years ago
10

Gravel is being dumped from a conveyor belt at a rate of 30 ft3/min, and its coarseness is such that it forms a pile in the shap

e of a cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 11 ft high? (Round your answer to two decimal places.)
Mathematics
1 answer:
pogonyaev3 years ago
8 0

Answer:

Rate of increase in height =\frac{dh}{dt}=0.3156ft/min

Step-by-step explanation:

we know that volume of a cone is given by

V=\frac{1}{12}\pi d^{2}h

It is Given that diameter equals height thus we have

V=\frac{1}{12}\pi h^{2}h\\\\V=\frac{1}{12}\pi h^{3}

Differentiating both sides with respect to time we get

\frac{dV}{dt}=\frac{1}{12}\pi \frac{dh^{3}}{dt}\\\\\frac{dV}{dt}=\frac{1}{12}\pi(3h^{2}\frac{dh}{dt})

Applying values and solving for \frac{dh}{dt} we get

\frac{dh}{dt}=\frac{12\frac{dV}{dt}}{3\pi h^{2}}\\\\\frac{dh}{dt}=0.3156ft/min

You might be interested in
Someone please answer and explain this!!! They are asking which is the graph of function f, and if it’s not one of the graphs th
Dvinal [7]
Check the picture below.

the piecewise function, has two subfunctions or behaviours, one if x < 1, meaning less, not equals, but less than 1, so it doesn't include one, so it has a "hole" on that endpoint.

and the second behaviour of the piecewise is if x ⩾ 1, larger or equals than 1, so it includes 1, so it has a solid ball on that endpoint.

4 0
3 years ago
Read 2 more answers
Which congruence postulate or theorem shows that the triangles below are congruent?
saul85 [17]

Answer:

A. AAS

Step-by-step explanation:

5 0
3 years ago
A middle school has an oval track with the dimensions shown. What is the distance around the track? use 3.14 for π. show your wo
Snezhnost [94]

Answer:

10859.94

Step-by-step explanation:

To solve this, you need to know the formula for solving the area of a circle: πr²

The first thing you should do is find the area of the square: 78 x 78 = 6084

Then, we find the area of the circle. To do this, we must figure out the radius. Luckily, the problem states that the combined diameter of both half circles is 78, which means the radius is 39. Then, we can apply the formula: π39².

39² = 1521

1521 x 3.14 = 4775.94

This is the combined area of both half circles.

Finally, we have to add: 4775.94 + 6084 = 10859.94

3 0
2 years ago
Read 2 more answers
A notebook that costs $0.75 to make in the factory is sold for $1.35.
kvasek [131]

Answer:

a) price markup $0.60

b) percent marked up 180%

Step-by-step explanation:

Amount marked up:

  1.35 - 0.75 = $0.60  

Percent markup:

  0.75x = 1.35

  x = 1.8 or 180%

5 0
3 years ago
T²= 4π² (M+m) ÷ ug
inessss [21]

Starting with ...

T^2=\dfrac{4\pi^2(M+m)}{ug}

1) Multiply by the inverse of the coefficient multiplying the sum with M, then subtract m.

\dfrac{T^2ug}{4\pi^2}=M+m\\\\M=\dfrac{T^2ug}{4\pi^2}-m

2) Multiply by g/T²

g=\dfrac{4\pi^2(M+m)}{T^2u}

6 0
2 years ago
Other questions:
  • 3 cups of flower.while Reese was making a batch of biscuits her dog jumped on the counter and spilled 1/4 of the flower on the f
    9·1 answer
  • Which function has the smallest minimum? (5 points)
    8·1 answer
  • if the body makes 100 billion new blood cells each day,approximately how many blood cells can it make each hour
    15·2 answers
  • A package of six construction toys costs $14.94, not including tax. If purchased separately, each truck is $2.99, not including
    12·2 answers
  • A box is a rectangular prism with a width of 24 inches and a height of 18 1/2 inches. The volume of the box is 10,656 cubic inch
    7·1 answer
  • Selling price and amount spent on Advertising were entered into a multiple regression to determine what affects lcd tv sales. th
    14·1 answer
  • What is c equal to in the equation 7c - 4 = 3c + 20
    10·1 answer
  • Please help me guys I beg you I will give you lots of credit plz
    7·2 answers
  • Which equation has no solution?
    7·1 answer
  • Lola saved $86.25 in 3 months. She saved $30.75 in the first month and $7.99 in the second month. How much money did Lola save i
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!