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4 years ago

What is 78-5.683?Please hurry and I'll mark brainliest!

Mathematics

2 answers:

MAXImum [283]4 years ago

5 0

Answer:

72.317

Step-by-step explanation:

Dafna1 [17]4 years ago

5 0

Answer: hope this helps

Step-by-step explanation: 78 - 5.683 = 72.317

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Volumes of the solids with disk or shell method?

lina2011 [118]

The answer to the questions of volumes are given as follows

a) $v=128 \pi$

b) $v=\frac{128}{3} \pi$

c) $v=\frac{1024}{5} \pi$

d) $V=\frac{13568}{15} \pi$

Generally, the questions are mathematically solved below

$y=\sqrt{x}, y=4, x=0$

a) x-axis

if $y=4, x=16, x=0$

Using disk method

$} v=\pi \int_{0}^{16}(\sqrt{x})^{2} d x \\$

$v=\pi\left(\frac{x^{2}}{2}\right)_{0}^{16} \\$

$v=\frac{\pi}{2} \times 16 \times 16 \\$

$v=128 \pi$

b) line y=4

if x=0, y=0 ;

$y=\sqrt{x} \Rightarrow x=y^{2}$

Using shell method

$v = \int_{0}^{4} 2 \pi(4-y) \cdot y^{2} d y \\$

$v=2 \pi \int_{0}^{4}\left(4 y^{2}-y^{3}\right) d y$

$v=2 \pi\left[\frac{4 y^{3}}{3}-\frac{y^{4}}{4}\right]_{0}^{4} \\$

$v=\frac{2 \pi}{12}[1024-768] \\$

$v=\frac{512 \pi}{12} \\$

$v=\frac{128}{3} \pi$

c) y-axis

0 ≤ y ≤ 4

x=y^2

Using disk method

volume

$v=\pi \int_{0}^{4} y^{4} d y$$

$v=\pi\left(\frac{y 5}{5}\right)_{0}^{4} \\$

$v=\frac{1024}{5} \pi$

d) line x=-1

y=√x, y=4, x=0

0 ≤ x ≤ 6

Using shell method

volume is

$V=\int_{0}^{16} 2 \pi(1+x) \sqrt{x} d x$$

$V=2 \pi\int_{0}^{16}(x^{1 / 2}+x^{3 / 2}\right) )d x\right. \\$

$V=2 \pi\left[\frac{x^{3 / 2}}{3 / 2}+\frac{x^{5 / 2}}{5 / 2}\right]_{0}^{16} \\$

$V=2 \pi\left[2 / 3 \cdot\left(4^{2}\right)^{3 / 2}+2 / 5\left(4^{2}\right)^{5 / 2}\right] \\$

$V=4 \pi / 3 \cdot 4^{3}+4 \pi / 5 \cdot 4^{5} \\$

$V=4 \pi\left(\frac{1}{3}+\frac{4^{2}}{5}\right)$

$V=\frac{256}{15}(5+48) \pi \\$

$V=\frac{256 \times 53}{15} \pi \\$

$V=\frac{13568}{15} \pi$

Read more about volumes

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8 0

2 years ago

Given tan(A)=5 and tan(B)=9, find the value of tan(A−B).

user100 [1]

Answer:

tan= 4

Step-by-step explanation:

This is actually very easy, basically u have 5 - 9.

So you have positive nine and a negative sign, which is used for subtraction, so in the integers rule, positive- negative= negative

so its 4.

I HOPE ITS RIGHT, IM 11

5 0

3 years ago

Capellas footwear has a monthly fixed cost of 2,400.it costs capellas $7.5 to produce each pair of shoes it sells. Write an expe

mel-nik [20]

Answer:

C(x) = 7.5k + 2400 is the expense equation.

Step-by-step explanation:

The fixed cost per month = $2,400

Cost of producing each shoe = $7.5

Here, let k be the number of shoes produced per month .

So, the monthly expense

= Fixed Cost + (Number of shoes produced per month x Cost per shoe)

or, C(x) = $2,400 + ( k x $7.5)

or, C(x) = 7.5k + 2400 is the expense equation.

6 0

3 years ago

Find the values of x for the following equations..<img src="https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2B4x-98%3D0" id="TexFormula1"

Travka [436]

Hello !

Look at the picture

7 0

3 years ago

PLEASE HELP DUE IN 2 HOURS AND EXPLAIN STEP BY STEP SO I CAN EASILY UNDERSTAND PLEASE

Archy [21]

They are vertical angles meaning they both have the same angle thus you can set the two equations equal to each other

9y+7 = 2y+28

Solve for y

Plug your y into one of the equations and you’ll get your angle

8 0

3 years ago

What is 78-5.683?Please hurry and I'll mark brainliest! ​

What is 78-5.683?Please hurry and I'll mark brainliest!