What is the lateral surface area of a cube with side length 9 cm?

Answers

Answer 1

Answer: $a=9cm\n\nsurface\ area:A_S=6a^2\to A_S=6\cdot9^2=6\cdot81=486\ (cm^2)$

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Can i know the steps to this answer?

Answers

(cos²Ф - 1) / sin Ф * 1/sin Ф=
1(cos²Ф-1) / (sin Ф* sinФ)=
(cos²Ф-1) / sin² Ф=

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Fundamental relation of trigonometry:
sin²Ф + cos²Ф=1 ⇒ sin²Ф=1-cos²Ф ⇒-sin²Ф=cos²Ф-1
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-sin²Ф/sin²Ф=1

Answer: (cos²Ф - 1) / sin Ф * 1/sin Ф=-1

A=1/3 (a+b+c)<br /> Solve for C<br /> Will give thanks to anyone who answers

Answers

$a = (1)/(3) (a+b+c)\n\n3a = a + b + c\n\n 3a - a = a - a + b + c\n\n2a = b + c\n\n2a - b = b - b + c\n\n2a-b = c\n\n\n \boxed{\bf{c = 2a - b}}$

when the 69th even natural number is subtracted from the 119th odd natural number, what is the result

Answers

69th even number is: 69*2 = 138
119th odd number is: (2*119) - 1 = 237
69th even natural number subtracted from the 119th odd natural number is:
237 - 138 = 99.

Answer:

Step-by-step explanation:

The answer is 99 since you need to double 69 and also 119 and then subtract 1 from the double of 119. Then you would subtract them to get 99.

Find a parametric representation for the surface. (Enter your answer as a comma-separated list of equations. Let x, y, and z be in terms of u and/or v.) The plane through the origin that contains the vectors i − j and j − k.