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mamaluj [8]
3 years ago
6

A conical paper cup has a radius of 2 inches. Approximate, to the nearest degree, the angle β so that the cone will have a volum

e of 20 in^3
Mathematics
1 answer:
dezoksy [38]3 years ago
5 0
Volume = area of base *height 

20 = pir^2 *h

20 = 3,14*4*h

h = 20/12,56 = 1,59 rounded 1,6

- using the triangle formed by radius,the height of cup and the slant height of cup so we can writing that

tan ß = h/r so tan ß = 1,6/2 = 0,8

tan ß = 0,8 so ß = arctan 0,8 = 38,6 degrees so 39 degrees 

hope helped 
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Correct option is:

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Assuming that the claim made was supported by the 95% confidence interval.

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