Elena is trying to draw a triangle with side lengths 4 inches, 3 inches, and 5 inches.

She uses her ruler to draw a 4 inch line segment .

She uses her compass to draw a circle around point with radius 3 inches

She draws another circle, around point with radius 5 inches.

Elena should put a point where the two circles intersect and draw line segments connecting that point to points A and B to finish her triangle.

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: