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3 years ago

Help me please i will give brainliest

Mathematics

1 answer:

AlekseyPX3 years ago

8 0

Answer:

Step-by-step explanation:

Number 13:

a+b=3+4

= 7

Number 14:

c-a= 12-3

= 9

Number 15:

a+b+c= 3+4+12

= 19

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

4 0

2 years ago

Please help!!!!!!!!!!

natta225 [31]

if 15 x 1.8 = 27 then

45 x 1.8 = 81

so answer: B) 81

8 0

2 years ago

What is the solution for 4w = 2/3

pentagon [3]

The answer is w= 1/6

3 0

2 years ago

Jane has saved 600 dollars in a college fund. She added money to the account over the next year and at the end of the year the a

lianna [129]

Answer:

$290.00

Step-by-step explanation:

The equation would be 890-600=290 because if you subtract the base amount from the final savings it would give you how much she saved altogether.

Hope this helps! :)

5 0

3 years ago

Dr. Saxton bought 5 and 1/2 pounds of chocolate for his store. He wants to separate the chocolate into 1/2 pound bags. How many

Harman [31]

Answer:

He can make 11 bags.

Step-by-step explanation:

Every bag holds 1/2 pound.

He has 5 1/2.

He can make 11 bags for his chocolate.

hope this helps.

6 0

2 years ago