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3 years ago

Choose the wavelength that is used in radio telescopes, heating food and radar.

Mathematics

2 answers:

frez [133]3 years ago

8 0

Microwave is the answer

ryzh [129]3 years ago

6 0

Pretty sure it’s microwave.

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754,863 rounded to the nearest ten thousands place

12345 [234]

754,863 rounded to the nearest ten thousands is 750,000

7 0

3 years ago

Determine the volume of the figure. Use 3.14 for π. Round your answer to the nearest tenth. Show all of your work.

Ostrovityanka [42]

Answer:

1985 cubic units (written as un. with the cubed exponent)

Step-by-step explanation:

First, you find the volume of the cylinder

Here's the formula:

$V=\pi r^{2}h\\V=volume\\r=radius\\h=height$

Now, you plug in and solve.

$V=(3.14)(7.2^{2})(7.4)\\V=(3.14)(51.84)(7.4)\\V=(162.7776)(7.4)\\V=1204.55424\\rounded:\\V=1204.6$

Then, you find the volume of the dome.

Here's the formula:

$volume/of/a/sphere=\frac{4}{3}\pi r^{3}\\volume/of/a/dome:\\V=\frac{2}{3}\pi r^{3} \\V=volume\\r=radius$

Now, you just plug in and solve.

$V=(\frac{2}{3})(\pi)(r^{3})\\V=(\frac{2}{3})(3.14)(7.2^{3})\\V=(\frac{2}{3})(3.14)(373.248)\\V=(2.093)(373.248)\\V=781.208064\\rounded:\\V=781.2$

Finally, you add them together, and there's your answer!

$1204.6+781.2=1985.8$

Hope this helped!

<em>brainliest?</em>

8 0

3 years ago

Bill removed the ten of spades and the king of hearts from a deck of standard playing cards and threw them in the trash. There w

AveGali [126]

Answer:

Step-by-step explanation:

2 if you mean 1 of each so it would be 50 cards

3 0

3 years ago

Please help me with these two.

Bad White [126]

Just 9

I'm not sure for the second one but I think 1 ft

3 0

3 years ago

Convert 5.764764764... to a rational expression in the form of a/b where b=0

Valentin [98]

Say x=5.764---
Then 1000x=5764.764---
Then 1000x-x = 5759
So 999x = 5759
So x=5759/999

I don't see how b can be 0 in this case... what does that mean? You would never divide by 0 and live to tell about it, right?

4 0

3 years ago