Which set of side lengths could be used to make a triangle?
5 cm, 8 cm, 2 cm

13 cm, 15 cm, 30 cm

22 cm, 8 cm, 27 cm

2 cm, 15 cm, 18 cm

22, 8, 27

Step-by-step explanation: the sum of the 2 shorter sides must be greater than longest side

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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: