Chapter 13.2, Problem 28HP

To determine

Tofind:the distance that the projected laser light show had an area of 100 square meter.

Answer to Problem 28HP

Thedistance from the laser to the screen in feet is $\text{25feet}$ .

Explanation of Solution

Given:

  $\text{A=0}{\text{.16d}}^2$ .

Where $\text{d}$ is distance from the laser to the screen.

Calculation:

Sample answer: Both permutations and combinations are used to find the number of possible arrangements of a group of objects. The order of the objects is important in permutations, but not in combinations. For example, randomly choosing  $5$  songs to play on a playlist in which you do not care about the order in which the songs are played is an example of a combination. If you do care about the order in which the songs are played, then it is an example of a permutation.