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pogonyaev
3 years ago
7

Find the SLANT HEIGHT of the pyramid, then calculate its SURFACE AREA.

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
3 0

Answer:

13 cm

Step-by-step explanation:

slant height = \sqrt{12^2 +\frac{10^2}{4} }

=\sqrt{144 + \frac{100}{4} }

=\sqrt{144 + 25}

=\sqrt{169}

=13 cm

a=10 cm

l =

surface area =a^{2} + 2a \sqrt{\frac{a^{2} }{4} +h^{2}  }

=10^{2} +2*10 \sqrt{\frac{10^{2} }{4} +12^{2} } \\100 + 20 \sqrt{\frac{100}{4} + 144} \\100 + 20\sqrt{25 + 144} \\100 + 20 \sqrt{169} \\100 + 20*13\\100 + 260\\360 cm^2

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glenn swims 2/3 miles on monday, 3/4mile on wednesday, and 5/6 miles on friday. What is the total of distance glenn swims on tho
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Answer:

She swam a total distance of 2  1/4 miles in those three days.

Step-by-step explanation:

Okay, so- The first thing you need to do is make all denominators equal to make these fractions able to be added together. So, I made all denominators 12. (Tell me if you don't know how to make them all the same denominator, and I'll be happy to help!)

<u>2/3  =  8/12   </u>

<u>3/4  =  9/12 </u>

<u>5/6  =  10/12</u>

Then, I added the numerators together. Like this:

<u>8 + 9 + 10 = 27 </u>

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<u>27/12</u>

Lastly, I changed this improper fraction to a mixed number. I multiplied the denominator twice because it looked like it would be closest to 27 without going over.

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3 years ago
Bryce, a top landscape architect, was given a special garden design job. The client owned a property as shown below, in which he
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.........................................

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2 years ago
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On October 15, 2019, Jon purchased and placed in service a used car. The purchase price was $38,000. This was the only business
san4es73 [151]

Answer:

cost recovery deduction = $1520

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given data

purchase price = $38,000

used the car  business  = 80%

used the car  personal = 20%

solution

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