I need 10.5 trees to make 5 cabins. How many trees do I need to make 3 cabins. Then how many trees to make 7 cabins

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.

Arecipe uses 2 cups of sugar to make 32 brownies. how many cups of sugar are needed to make 72 brownies?

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i