In order to find how many additional workers are needed to staff the extra crews you first need to calculate how many workers are on a crew. There are 16 workers at the company now and that's enough to staff 4 crews so there are \( \frac{16}{4} \) = 4 workers on a crew. 9 crews are needed for the busy season which, at 4 workers per crew, means that the roofing company will need 9 x 4 = 36 total workers to staff the crews during the busy season. The company already employs 16 workers so they need to add 36 - 16 = 20 new staff for the busy season.

Latoya scored 94% on the test meaning she earned 94% of the possible points on the test. There were 360 possible points on the test so she earned 360 x 0.94 = 340 points. Each question is worth 4 points so she got \( \frac{340}{4} \) = 85 questions right.

A number in scientific notation has the format 0.000 x 10^exponent. To convert to scientific notation, move the decimal point to the right or the left until the number is a decimal between 1 and 10. The exponent of the 10 is the number of places you moved the decimal point and is positive if you moved the decimal point to the left and negative if you moved it to the right:

0.0005129 in scientific notation is 5.129 x 10^-4

To add these distances, they must share the same unit so first you need to first convert the swim distance from meters (m) to kilometers (km) before adding it to the bike and run distances which are already in km. To convert 400 meters to kilometers, divide the distance by 1000 to get 0.4km then add the remaining distances:

total distance = swim + bike + run
total distance = 0.4km + 40.8km + 10.6km
total distance = 51.8km

You have 15 out of the total of 250 raffle tickets sold so you have a (\( \frac{15}{250} \)) x 100 = \( \frac{15 \times 100}{250} \) = \( \frac{1500}{250} \) = 6% chance to win the raffle.