Reshawn is buying 3 books in the triology set

Reshawn is buying 3 books in a trilogy set for $24.81.

He will save $6.69 by buying the trilogy set instead of buying individual books.

Each book costs the same amount

Let’s find out  how much does each of the 3 books cost when purchased individually.

=> 3 books costs = 24.81 dollar in which he saved 6.69 dollar compare to buying individual.

=> 24.81 + 6.69 = 31.5 dollars

=> 31.5 dollars / 3 = 10.5 dollars = the individual price of the books.

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5

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: