On the basis of extensive tests, the yield point of a particular type of mild steel-reinforcing bar is known to be normally dist

0.003 is one-tenth of 0.03.

The average is calculated as 60 / 4 = 15

13 - 15 = -2
17 - 15 = 2
9 - 15 = -6
21 - 15 = 6
The total of squares amounts to 4 + 4 + 36 + 36 = 80

Since this is a sample, we divide it by n - 1 (which equals 3)

The standard deviation is calculated as sqrt(80/3) = 5.16 as the final answer.

To find the meal price, divide the tip by the tip percentage:

3.25 / 0.20 = 16.25

The cost of the meal is $16.25

Start with 0. Subtracting three checks of $35 gives 0 - 35 - 35 - 35 = -105. Subtract the $15 overdraft penalty to get -120. So the balance is -$120. hope this helped.