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3 years ago

50 POINT QUESTION

Mathematics

1 answer:

LenKa [72]3 years ago

7 0

Answer:

0.04 or 4%

Step-by-step explanation:

point estimate of proportion:

(0.6+0.68)/2

1.28/2

0.64

Margin of error:

0.68 - 0.64 = 0.04

0.04×100 = 4%

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alisha [4.7K]

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2 years ago

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podryga [215]

Answer:

The correct answers are a, c and d

Step-by-step explanation:

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3 years ago

BRAINLIEST AND 20 PT FOR THE ANSWER THAT EXPLAINS THE BEST!!!!

Rama09 [41]

Answer:

The answer is C (9,4.5)

Step-by-step explanation:

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2 years ago

Read 2 more answers

A bucket that weighs 4 lb and a rope of negligible weight are used to draw water from a well that is 60 ft deep. The bucket is f

jonny [76]

Answer:

2580 ft-lb

Step-by-step explanation:

Water leaks out of the bucket at a rate of $\frac{0.15 \mathrm{lb} / \mathrm{s}}{1.5 \mathrm{ft} / \mathrm{s}}=0.1 \mathrm{lb} / \mathrm{ft}$

Work done required to pull the bucket to the top of the well is given by integral

$W=\int_{a}^{b} F(x) dx$

Here, function $F(x)$ is the total weight of the bucket and water $x$ feet above the bottom of the well. That is,

$F(x)=4+(42-0.1 x)$

$=46-0.1x$

$a$ is the initial height and $b$ is the maximum height of well. That is,

$a=0 \text { and } b=60$

Find the work done as,

$W=\int_{a}^{b} F(x) d x$

$=\int_{0}^{60}(46-0.1 x) dx$

$&\left.=46x-0.05 x^{2}\right]_{0}^{60}$

$=(2760-180)-0[$

$=2580 \mathrm{ft}-\mathrm{lb}
$

Hence, the work done required to pull the bucket to the top of the well is $2580 \mathrm{ft}- \mathrm{lb}$

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3 years ago

Polynomials

drek231 [11]

D is the correct answer according to my calculations so try D first

8 0

3 years ago