Kenji has $600 to spend on exercise classes. each weight training class(x) costs $20 and each aerobic class(y) costs $15. write an inequality for this situation and determine which ordered pair is a solution to the inequality. a. 645-09-08-00-00_files/i02.jpg c. 645-09-08-00-00_files/i021.jpg b. 645-09-08-00-00_files/i022.jpg d. 645-09-08-00-00_files/i023.jpg

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: