Creating a license plate with 3 letters followed by 4 digits from 0-9. (Assume you may repeat letters and numbers.)

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

Shannon mary and john earn a weekly allowance ahannon earns the amount that is 2/3 of what john earns mary earns an amount that is 1 2/3 of what johns earns 20 dollars a week who eaens the greatest allowance and who earns the least