Which statement is an example of the symmetric property of congruence?
a. if efg hjk, and hjk mnp, then efg mnp.
b. if efg hjk, then hjk mnp.
c. efg efg
d. if efg hjk, then hjk efg.

each side has a different length.  

step-by-step explanation:

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: