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Nina [5.8K]
4 years ago
12

Help me please I’m new here

Mathematics
1 answer:
Lostsunrise [7]4 years ago
4 0

Given:

Composite figure made of cylinder and two spheres.

To find:

The volume of the composite solid

Solution:

Radius = 2 in

The value of π = 3.14

<u>Volume of sphere:</u>

$V=\frac{4}{3} \pi r^3

$V=\frac{4}{3} \times 3.14 \times 2^3

$V=\frac{4}{3} \times 3.14 \times 8

V=33.49

Volume of a sphere is 33.49 in³

Volume of two spheres = 2 × 33.49 = 66.98 in³

Radius of cylinder = 2 in

Height of cylinder = 8 - 2 - 2 = 4 in

<u>Volume of cylinder:</u>

$V=\pi r^2 h

V = 3.14 × 2² × 4

V = 50.24

Volume of cylinder = 50.24 in³

Volume of composite solid = Volume of two spheres + Volume of cylinder

                                             = 66.98 in³ + 50.24 in³

                                             = 117.2 in³

The volume of the composite solid is 117.2 in³.

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Answer:

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$24.72+.99=25.71

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It took Jessica 6 minutes and .03 seconds to finish a mile

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3 years ago
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Answer:

i believe it is 2/6

Step-by-step explanation:

3 0
3 years ago
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Find f(1/4)<br><br> if f(x)=4x^2-2/3x<br><br>please guys explain it to me I cant understand it ​
Jet001 [13]

Answer:

f(1/4) = 1/12

Step-by-step explanation:

f(x) = 4x^2 - 2/3 x is a function. The name of the function is simply the letter f. It tells you a rule. f(x) is the same as y.

It is the same as having

y = 4x^2 - 2/3 x

For each value of x you are given, you can calculate a corresponding value of y. Instead of calling y, y, we call y "f(x)" which is a way of showing that this relation is a function.

If you were given

y = 4x^2 - 2/3 x and were asked to find the value of y when x = 1/4, what would you do?

You would substitute 1/4 for x in the expression 4x^2 - 2/3 x, and you'd find the value of y.

Being asked to find f(1/4) for function f(x) = 4x^2 - 2/3 x means exactly the same. It means what is the value of the function when x = 1/4? What is the y value corresponding to an x value of 1/4?

Let's calculate it:

f(x) = 4x^2 - 2/3 x

To show we are evaluating the function at an x value of 1/4, we use the notation f(1/4). f(1/4) means find the value of y for function f when x = 1/4. We replace x with 1/4 and do the math.

f(1/4) = 4(1/4)^2 - (2/3)(1/4)

f(1/4) = 4(1/16) - 2/12

f(1/4) = 4/16 - 2/12

f(1/4) = 1/4 - 2/12

f(1/4) = 3/12 - 2/12

f(1/4) = 1/12

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Answer:

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