Found this when I was doing my own work, hope this helps.
Answer:
The final velocity v is 21.74 m/s.
Step-by-step explanation:
Given:

To find:

Solution:
As we know the third equation of motion is represented as

Substituting the values u, a and s in the above equation we get


It would be 99%. If you draw the normal distribution curve and plot the mean and standard deviation, it might help you visually.
:)
Answer:
The bottom one: The value is the difference of 42 and the sum of 20 and 3.
Step-by-step explanation:
The answer is what you get when you subtract 23 from 42. Using "the difference" means subtraction is involved and you expression is 42 - (minus) (20+3).
The probability is all the numbers on the dice added up under 6 so its 6/18 hope this helps :)