Step-by-step explanation:

Since there are 28 tens which is basically 28 rows of 10 all you have to do is 28 times 10. Whatever number times ten has a 0 after it so the answer is 280
110x4=440 beats in 4 minutes
Answer:
2016 possible combinations
Step-by-step explanation:
7 x 6 x 4 x 4 x 3 = 2016
When finding available combinations, you just take all your numbers with the different options and multiply them :)
Diameter is the distance from edge to edge of a circle through the center point. Radius is half the diameter.