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3 years ago

Just in case you can't see the first one

Mathematics

1 answer:

Semenov [28]3 years ago

5 0

The 4th pix.....the lower right one is correct. Any point that is less than 2 on x cordinate

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Find the work done in winding up a 175 ft cable that weighs 3 lb/ft.

nignag [31]

Answer:

$work \ done= 45937.5$

Step-by-step explanation:

Work done is given by

$work \ done=\int_a^b w(d-x) \ dx$ , where d = length of cable and w = weight of cable.

Here, d = 175 ft and w = 3 lb/ft

Now, $work \ done=\int_0^{175} 3(175-x) \ dx$

$work \ done= 3\left [175x-\frac{x^2}{2} \right ]_0^{175}$

$work \ done= 3\left [175^2-\frac{175^2}{2} \right ]$

$work \ done= 3\cdot \frac{175^2}{2}$

$work \ done= 45937.5$

8 0

3 years ago

Simplify:$$\sqrt{2\sqrt{8^2+15^2}+\sqrt{9^2+40^2}}$$

bagirrra123 [75]

Answer:

$5\sqrt{3}$

Step-by-step explanation:

$\sqrt{2\sqrt{8^2+15^2}+\sqrt{9^2+40^2}}=?\\\\1)\sqrt{8^2+15^2}=\sqrt{289}=17\\2)\sqrt{9^2+40^2}=\sqrt{1681}=41\\3)2\times17=34\\4)\sqrt{34+41}=5\sqrt{3}$

All Done!

8 0

3 years ago

Read 2 more answers

Factor the following polynomial: 2x^2+8x

timama [110]

Look at the attached picture⤴

Hope it will help u..

6 0

3 years ago

translate this sentence into an equation. 54 is the product of Rita savings and 3. Use the variable r to represent Rita savings.

Sphinxa [80]

54 = 3r. ABC DEFGHIJKLNOPQRSTUVWXYZ

8 0

2 years ago

Dane says that the answer to the problem 4 to the 6th power times 4 to the 3th power is 16 to the 9th power. What was his mistak

lesya [120]

Step-by-step explanation:

his mistake was that he didnt follow the rules of the order of operations and he multiplied 4 by 4 and just added the third power and the 6th power getting the wrong answer

hope this helps:) good luck

8 0

3 years ago