Find the value of 9x c when c=9.

9 times 9 equals 81

Step-by-step explanation:

The answer will be 81

Step-by-step explanation:

The answer will be 81 because you would replace the variable C with it's value which is 9. So 9x9=81

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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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