Interest=percent times rate(in years) times principal.
Or I=PRT
So you invest $580 so I=$580 Rate would be .10 and time would be 1 for one year. So if you put this into the formula you get
$580=P(.65)(1)
So $580=.65P so $580/.65=P so P is approximately $892.31 per year.
Answer:386
Step-by-step explanation:
We have given
Smoothing parameter 
Forecasted demand
Actual demand
And Forecast is given by





203.03968253968254
that is the answer
Total is 61.36 not sure how much she should leave for tip