SOMEBODY PLEASE HELP! The CORRECT answer will get brainliest! ASAP! What is the best way to gather information for each of the scenarios?

Select Survey, Experiment, or Observational study for each scenario.

A director wants to know what his singers do before a performance.
A director wants to know who his best soprano is.
A director wants to know how verbally disciplining a singer affects the group.
A director wants to know what musical is the most popular in the community.

Have a performance then record what they do

Have a soprano excersice

Create a diagram where one person is verbally disciplined and have another person who is not verbally disciplined

Have a Graph and record data

Step-by-step explanation:

which expression can be used to convert 80 us dollars (usd) to australian dollars (aud)?

1 usd = 1.0343 aud

1 aud = 0.9668 usd

step-by-step explanation:

sorry just need the points

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value