How do I find the surface area of this shape?

235.2 inches

Step-by-step explanation:

bottom triangle:

base = 12 in

height = 10.4 in

area = (1/2) (12 × 10.4) = 62.4

side triangles:

base = 12 in

height = 9.6 in

area = (1/2) (12 × 9.6) = 57.6

Surface Area:

3(57.6) + 62.4 =

172.8 + 62.4 = 235.2

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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