The surface area of a rectangular prism is 442 square feet. the length is 11 feet, and the height is 8 feet. what is the width of the prism?
i need an explanation on how to work this problem.

There are 6 surfaces on a rectangular prism . 3 pairs of equal area.

Surface area  2wl + 2hw + 2 hl     where h = height, w = width,  l = length.

So inserting the given values:-

442 = 2*w*11 + 2 *8* w + 2*8*11

442 = 22w  + 16w + 176

38w =  442-176 = 266

w =  7

width = 7 feet

The percentage- 18. X -- --- X=60 30. 100 X. 60 -- -- 400. 100. X=24 The answer is 24 students out of 400 students participated in after school activities