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2 years ago

7

Mary is wrapping a can of paint as a gag gift for a friend. If the can is 11 inches high and has a diameter of 7 inches. How man

y square inches of wrapping paper will she use in completely covering the can?
PLZ SHOW WORK!!!!!!!!!!!!

1 answer:

ddd [48]2 years ago

4 0

Total surface area
=[ 2πr x 11 ] + πr²
=[ 2 x (22/7) x 3.5 x 11 ] + 2[ (22/7) x 3.5² ]
=154 + 2(15.393)
=184.786 in²

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SO CONFUSED PLEASE SOMEONE EXPLAIN! DUE SOON AND NEED HELP!!!!!!!! QUESTION IN PICTURE BELOW

jeka57 [31]

Answer:

=> Apply law of cosine

$c^2=a^2+b^2-2abcos\left(C\right)$

=> input value

$z^2=6.5^2 + 9.4^2-\left(6.5\right)\left(9.4\right)\left(cos\left(131\right)\right)$

=> simplify

$z=\sqrt{\left(6.5^2+\:9.4^2\right)-\left(6.5\right)\left(9.4\right)\left(-0.65605902899\right)}$

=> calulcation

$z=\sqrt{-61.1\cos \left(131^{\circ \:}\right)+130.61},\:z=-\sqrt{-61.1\cos \left(131^{\circ \:}\right)+130.61}$

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2 years ago