1. how many 5-digit zip codes can be formed if the first digit cannot be 0 or 1, and if not no digit can be repeated ?

2. how many ways can a president, vice president, treasurer and secretary be chosen for a committee of 9 people?

3. a standard die rolls 4 times. find p (four 2s).

Step-by-step explanation:

30240 without any repeating numbers

72 ways to choose a president and vice president

I am not sure of the last problem

the ratio of white tiles to blue tiles is 48: 16. the ratio in it's simplest form is 3: 1.

step-by-step explanation:

ratio: take the first number and add a colon next to it, then add the second number after that. make sure the ratio order matches up with the written problem!

simplest form: we can simplify the ratio 48 : 16 by dividing both terms by the greatest common factor (gcf).

the gcf of 48 and 16 is 16.

divide both terms by 16:

48 ÷ 16 = 3

16 ÷ 16 = 1

reducing to simplest form:

48 : 16 = 3 : 1