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3 years ago

Find the volume of each figure.show your work. Use 3.14 for pi. Round to the nearest hundredth

Mathematics

2 answers:

Solnce55 [7]3 years ago

6 0

Pretty sure it’s 2 if not then sorry

MrRissso [65]3 years ago

6 0

Used the formulae you have such as PIE a nd then multiply it and you will most likely get your answer

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Use the definition of the derivative to differentiate v=4/2 pie r^3

nata0808 [166]

I suspect 4/2 should actually be 4/3, since 4/2 = 2, while 4/3 would make V the volume of a sphere with radius r. But I'll stick with what's given:

$\displaystyle \frac{dV}{dr} = \lim_{h\to0} \frac{2\pi(r+h)^3-2\pi r^3}{h}$

$\displaystyle \frac{dV}{dr} = 2\pi \lim_{h\to0} \frac{(r^3+3r^2h+3rh^2+h^3)- r^3}{h}$

$\displaystyle \frac{dV}{dr} = 2\pi \lim_{h\to0} \frac{3r^2h+3rh^2+h^3}{h}$

$\displaystyle \frac{dV}{dr} = 2\pi \lim_{h\to0} (3r^2+3rh+h^2)$

$\displaystyle \frac{dV}{dr} = 2\pi \cdot 3r^2 = \boxed{6\pi r^2}$

In Mathematica, you can check this result via

D[4/2*Pi*r^3, r]

3 0

2 years ago

What would be the volume of a tree that has a radius of 2 feet and a length of 14 feet?

Blababa [14]

Answer:

C) 175.84 cubic feet

Step-by-step explanation:

V=πr^2h is the formula I used

I plugged in the numbers and solved

7 0

2 years ago

Read 2 more answers

Given that ab = x, evaluate the following:<br> c<br> 2a3b+a2b+ab

Mrrafil [7]

It will be ......
.......

4 0

3 years ago

What is the y-intercept of the line describe by the equation below? Y=5x-22

dexar [7]

Answer:

The y intercept is (0,-22)

Step-by-step explanation:

The y intercept is the value when x =0

Y=5x-22

y = 5*0 -22

y = -22

The y intercept is (0,-22)

8 0

3 years ago

Eva had 7/8 gallon of paint. His brother ivan used 1/4 gallon to paint his model boat. Eva needs at least 1/2 gallon to paint he

algol13

Answer: .625 (yes he did leave enough

Step-by-step explanation: First you need to divde the fractions( or solve them) ,so 7 divided by 8 and so on Then you take subtract the paint ivan used, if it is less than half than ivan didn't leave enough for his poor sister

but there are other ways if this one is to hard

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3 years ago