Compute the permutations and combinations.
6 p 4
15
30
360

The average human heart beats 72 beats per minute. how many times does it beat in 15 seconds?

When eating out, record the total cost of your meal (before tip) and the tip that you left. determine the percent of the cost of the meal that you left as a tip.

1. are the triangles similar and if so why? what is the value of x? show your work.