Identify the surface area of the composite figure.
explain it step-by-step.

128 square meters

Step-by-step explanation:

Surface Area is sum of the area of all the surfaces.

In the bottom portion, There are 5 squares (each 4 * 4 dimension) -- front, back, 2 sides, and bottom.

The area of 5 of these are:

5 * (4 * 4) = 80

In the top portion, there are 4 triangles each with dimensions height = 6 and length = 4, so the area of triangle is 1/2 * length * height. Hence, the area of 4 of these are:

4 * ( 1/2 * length * height = 1/2 * 4 * 6  = 12)

= 4 * 12

= 48

Hence total surface area = 80 + 48 = 128 square meters.

  n=   0.0000 - 0.3750 i  

  n=   0.0000 + 0.3750 i

step-by-step explanation:

one of these should be correct

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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