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3 years ago

Use long division to find the quotient below.

Mathematics

1 answer:

vichka [17]3 years ago

3 0

Answer:

Step-by-step explanation:

D 4x2-8x+20

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To determine the ________ of an event, you can use the formula P(E) = n(E)/n(S), where n(E) is the number of outcomes in the eve

Semenov [28]

Answer:

Probability

Step-by-step explanation:

Probability of an event is how likely that event is to happen. And it is denoted by letter P and calculated by the formula below:

P(E) = number of possible outcome/number of the total event sample

P(E) = n(E) / n(S)

3 0

3 years ago

A force of 7 lb is required to hold a spring stretched 9 in. beyond its natural length. How much work W is done in stretching it

Ymorist [56]

144 joules is the work W done in stretching it from its natural length to 13 in beyond its natural length

Force F=10 lb

From the hookes Law

$F=kx$

Therefore, calculate k for the spring for

$10=k(\frac{4}{12}) = > k=\frac{120}{4}=30$

Work done in stretching a spring through a length dx is

$dW=F.dx = > dW=kxdx$

For calculating the work done for stretching the spring to x=6in=(6/12)feet beyond the natural length, Integrate over the limits of x=0 to x=1/2

Therefore,

$\int_{0}^{W}dW=\int_{0}^{0.5}kxdx = > W=\frac{1}{2}k[x^2]_{0}^{0.5}=\frac{1}{2}30 \times (0.5)^2=\frac{30}{8}$

That is,

$W=\frac{15}{4} ft-lb\\$

The answer that is given is for stretching the spring to 4 inches.

Mass of 10 m of chain length is 80kg. This implies, Mass per unit meter length of the chain is

$m_{l}=\frac{80}{10}=8kg/m$

Consider a small length dx of the chain at the end point A. Work done in lifting the small length dx over the height of x meters is

$dW=(8g)dx \times x=8gxdx$

Now, integrate over the the value of x from

x=0 when end of the chain A is on the ground

x=6 when end of the chain A reaches 6 m above the ground

That is,

$\int_{0}^{W}dW=\int_{0}^{6}8gxdx=8g [\frac{x^2}{2}]_{0}^{6}=4g(6^2-0^2)$

$W=4g \times 36=144g \ Joules$

Hence,144 joules is the work W done in stretching it from its natural length to 13 in beyond its natural length

Learn more about Integration here brainly.com/question/2263647

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2 years ago

I’ll mark as BRANLIEST!!!

Alja [10]

Answer:

$68,656,500 im so sorry if im wrong

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3 years ago

Which of the following is equivalent to 3 up 4<br><br> 7 <br><br> 81<br><br> 12<br><br> 64

Softa [21]

Answer:

81.

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PLEASE HELP LMALNEBDKE 5TH GRADE MATH

Maurinko [17]

Answer:

the third one

Step-by-step explanation:

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