Calculate the unit rate. a) 15 km travelled in 10 min

b) $13.95 for 0.45 kg of tuna fish

If i have one apple and give you the apple, how many apples do i have?

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

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.