Express each ratio as a fraction in simplest form 16 feet out of 40 feet

Step-by-step explanation:

Start by dividing top and bottom by 4

16 / 4 = 4

40/4 = 10

The result so far is 4/10

But 4/10 is not the answer. You can divide 4 and 10 by 2

4/2 = 2

10/2 = 5

2/5

22.83 repeating

step-by-step explanation:

137 ÷ 6 is 22.8333333 therefore we understand that 3 is repeating.

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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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step-by-step explanation: