PLEASE HELP ME WITH THIS I WILL GIVE BRAINLIEST

Can someone please help me with this? I know how to find area & circumference of semi and whole circles. Thank you!

anyanavicka [17]

the area is about 62 in.2

Hope this helps;-)

7 0

3 years ago

Out of 190 CDs tested, 26 are defective. Estimate the number of defective CDs in a batch of 1000.

liberstina [14]

Divide the number of defective by the number checked:

26/190 = 0.1368

Multiply that by 1000:

0.1368 x 1000 = 136.8

Round up to 137

Out of 1000 cd’s 137 would be defective

3 0

3 years ago

What is the volume of the cylinder shown below?

VladimirAG [237]

Answer:

B) 1452π units³

Step-by-step explanation:

To find the Volume of a cylinder, use this formula:

<em>V</em> (cylinder) = πr²h

Note that:

r = radius of the circle (base) = 11

h = height of the cylinder = 12

π = 3.14

Plug in the corresponding numbers to the corresponding variables.

V = (3.14)(11)²(12)

Remember to follow PEMDAS. First, solve for the power, then solve left -> right.

V = (3.14)(121)(12)

V = (379.94)(12)

V = 4559.28 units³

Note that the answer choices have π in them, divide π from the answer, and add to the answer.

V = (4559.28)/3.14 = 1452π units³

B) 1452π units³ is your answer.

~

6 0

3 years ago

Identify the minimum value of the function y = 2x^2 + 4x

statuscvo [17]

The function's minimum value is -2 at x = 1

Step-by-step explanation:

Given function is:

$y = 2x^2+4x$

In order to find the maxima or minima of a function, first of all, we have to find the derivative of the function

So,

Taking derivatives on both sides

$\frac{d}{dx}(y) = \frac{d}{dx} (2x^2-4x)\\\frac{dy}{dx} = \frac{d}{dx} (2x^2) - \frac{d}{dx} (4x)\\y' = 2 \frac{d}{dx} (x^2) - 4 \frac{d}{dx}(x)\\y' = 2 (2x) \frac{d}{dx}(x) - 4(1)\\y' = 4x (1) - 4\\y' = 4x - 4$

We have to find the roots of first derivative

So,

$4x-4 = 0\\4x = 4\\x = \frac{4}{4} \\x = 1$

Taking second derivative

$\frac{d}{dx} (y') = \frac{d}{dx} (4x-4)\\y'' = 4$

We can see that the second derivative of the function is a constant so the function has a minima at x=1

For minimum value, putting x = 1 in the function

$= 2(1)^2 - 4(1)\\= 2(1) - 4\\= 2-4\\= -2$

The function's minimum value is -2 at x=1

Keywords: Functions, minimum value

Learn more about functions at:

#LearnwithBrainly

8 0

3 years ago

Claire wants to buy enough sand to fill a sandbox that is shaped like a rectangular prism. The sandbox is 4 feet long, 4 feet wi

nataly862011 [7]

First, find the volume of the sand box
4 x 4 x 0.5 (L x W x H) = 8

8 divided by 0.5 is 16, so you need 16 bags
Well,how much does that cost

16 x 2.55 = $40.80

Hope this helps :D

7 0

3 years ago