What amount today is equivalent to $10,000 ,4 years ago, if money earned 5.5% compounded monthly over the last 4 years? 2.How much interest is earned by investing $2100 for three years at 4.5% compounded monthly?

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

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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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