I have to show my work if you help me show my work ill give brainliest

16

Step-by-step explanation:

      20.00

       -3.58

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Ok so first part is 0-8 which won't work so you need to borrow from the one on the left. The left is also 0, so the second zero needs to borrow from the next number on the left. That one is once again another 0 which also needs to borrow. Finally we reach a 2, which becomes 1 because it gives the 0 on it's right 1. So the zero on it's right becomes 10, but the others still need to borrow. So the zero that's now a ten will give 1 to the one on IT'S right. So the zero that used to be 10 is now 9, and the zero next to it is 10. Finally the zero that is currently 10 gives to the one on the furthermost right, making the last zero a ten and the one that gave becomes a 9. Here's what it looks like now:

Check the file 1

So now you subtract normally, using the numbers that aren't crossed

I know this was long but hope you understood!

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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