Which number has the same value as 20 tens?

In an experiment you are to flip a two sided coin 100 times and record 55 heads up and 45 tails up determine the theoretical and experimental probability of getting a heads up in the experiment.

Translate the following situation into an inequality statement . lily has $25 to spend on a charm bracelet for her sisters birthday gift the cost of the bracelet is $12 plus $1.50 per charm

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?