What is the greatest 2 digit multiple of 10?

10

calaulate the unit rate what dose this mean ?

multiply your 10's until your answer has 3 digits, the previous one is it.

To find the greatest 2-digit multiple of 10, you need to multiply 10 by the highest possible 1-digit number. The highest possible 1-digit number is 9, so you would multiply 10 by 9. The answer is 90, which is the greatest 2-digit multiple of 10.

To calculate the unit rate, you need to determine the rate at which something occurs or is measured per unit of something else. For example, if you are given the distance traveled in miles and the time taken in hours, the unit rate would be the speed in miles per hour.

To calculate the unit rate, divide the given quantity by the corresponding unit. For example, if you travel 150 miles in 3 hours, divide 150 by 3 to get a unit rate of 50 miles per hour.