Please help
I will give brainlist

What is the difference between the predicted value and the actual value

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?