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lorasvet [3.4K]
3 years ago
10

Can someone please answer. There is one question. There a picture. Thank you!

Mathematics
1 answer:
Anuta_ua [19.1K]3 years ago
6 0
Ok so you need the surface area formula of a cone.

A = πrl +  πr∧2

where π = 3.14 (pi) 
           r = half of the diameter (18/2 = 9)
           l = slant hight ( 22 )
Slot this into the equation  A =  (3.14 [ rounded] )(9)(22) + (3.14 [ rounded] )(9)∧2 = 876.06 this is due to the rounded pi the answer is 876.5 i.e the third.

Hope this helps :D.
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Nick does not has enough money to follow this recommendation.

Step-by-step explanation:

Given: A self-service car wash charges $4 for the initial 5 minutes plus an additional $0.75 for each minute after that.

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For m\geq15

\\\Rightarrow\ y=4+0.75(m-5)\geq4+0.75(15-5)\\\Rightarrow\ y\geq4+0.75(10)\\\Rightarrow\ y\geq4+7.5\\\Rightarrow\ y\geq11.5

But Nick has $10 which is less than $11.5, so he does not has enough money to follow this recommendation.

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