It must end in a 0 for the number to be divisible by 10. The other 5 can go in any order, so 5 factorial (5!) = 5*4*3*2*1
120 numbers
The probability that it doesn't land on 4 would be 3/8. This is because theres a 5/8 chance it lands on 4 so just do the opposite which would be 3/8.
Since 19 is 76% of 25, we can assume that 76% of the people in the restaurant like the new menu. 76% of 227 is roughly 173. So about 173 people liked the menu that day. Hope this helps :)
Negative exponents work the same as positive ones, except you have to consider the inverse of the base.
So, if for example
, in the same fashion you have

So, negative exponents lead to a fraction with numerator 1 and denominator the same expression, but with positive exponent.
So, in your case, let's work with the inner parenthesis first:

Now, if we want to raise this to the negative two, we have

Answer:
You need to attach a picture of your problem.