An explanation needed too please

you need to use Pythagoras therum.

to help you figure it out, you can draw a 90° angled triangle.

6,8,10 Is correct because:

x= 10 is correct

9,12,15 is also correct. try to do what I did with 6,8,10...

16,30,34 is also correct

the wrong answer is 10,20,30

If you need anymore help tell me.

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:

b. 2 and 4

step-by-step explanation: