6xy in simplest form is simply 6 to the second power
Hope this helps!
Answer:

Step-by-step explanation:
Regular coordinates (x, y)
Polar coordinates (r, φ)

We have the point

Substitute:

Answer:
25.5 days
Step-by-step explanation:
Mean number of days (μ) = 22 days
Standard deviation (σ) = 6 days
Z-score for the 72nd percentile (according to tabulated values) = 0.583
The z-score for any number of days, X, is determined by:

The value of X that is greater than 72% of the trial times is:

Therefore, 72% of all of these types of trials are completed within 25.5 days.