Write your answer in scientific notation.
Look at the picture!

507.3

Step-by-step explanation:

(7.3x10)+(5x10)

evaluate the power

remove the parentheses

(7.3x1)+5x10 to the second power

multiply 7.3+5x100

7.3+500

calculate

there you go.

There are 19 people total, and groups of four are being asked of us. We can use the formula for permutations or combinations.

Permutations: 
Combinations: 
Where in both scenarios, there are n objects being chosen at r times.

19 P 4 is 93024
19 C 4 is 3876
It all depends on whether order matters with group placement; if it does, your answer is 93024, if not, then your answer is 3876.

:)