Suzanne lays the books end to end and finds that the board is the same length as 21 bucks. how many centimeters long is the board?

Step-by-step explanation:

Well first you would have to find the centimeter and the length of the board once you do that you would multiply 21×17(÷4)600000000.+21

And then you divide and you'll get your answer

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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a c

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