The commutative property states that, when adding or multiplying numbers, the order in which they're added or multiplied does not matter. For example, 3 + 4 and 4 + 3 give the same result, as do 3 x 4 and 4 x 3.

Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):

2 + (4 + 4) ÷ 5 x 5 - 2²
P: 2 + (8) ÷ 5 x 5 - 2²
E: 2 + 8 ÷ 5 x 5 - 4
MD: 2 + \( \frac{8}{5} \) x 5 - 4
MD: 2 + \( \frac{40}{5} \) - 4
AS: \( \frac{10}{5} \) + \( \frac{40}{5} \) - 4
AS: \( \frac{50}{5} \) - 4
AS: \( \frac{50 - 20}{5} \)
\( \frac{30}{5} \)
6

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:

1,003,000 in scientific notation is 1.003 x 10⁶

A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.

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 500 meters to kilometers, divide the distance by 1000 to get 0.5km then add the remaining distances:

total distance = swim + bike + run
total distance = 0.5km + 50.2km + 5.1km
total distance = 55.8km