What is the surface area of the triangular prism?

check the picture below.

so the prism is really two triangles, front and back, and three rectangles, stacked up to each other at the edges.

now, if we just get the area of each of those figures, and sum them up, that's the area of the triangular prism.

the triangles have a height of 9, a base of 24, recall A = (1/2)bh.

left and right rectangles are just 40x15.

the rectangles at the base is just 40x24

$18 was the price of the t-shirt

step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: