Arthur is drawing triangles. All of the triangles have a base length of 5 inches. The area of the triangle is proportional to the height of the triangle. Which table shows the proportional relationship correctly?
A.
Heights (cm) 3 5 7
Area (sq cm) 7.5 12.5 18.5

B.
Heights (cm) 6 8 10
Area (sq cm) 15 19 25

C.
Heights (cm) 4 5 6
Area (sq cm) 10 13.5 17

D.
Heights (cm) 2 4 7
Area (sq cm) 5 10 17.5

If the base is 8cm & the height is 12cm, then you take 8x12, which is 96, and divide it by 2, which would be 48, so the answer is A

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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