Amplitude is 4
I don’t know the cos function, sorry :(
Adding a negative number is the same as subtracting a positive number. So 2315.5 - 3166.75 = -851.25
Answer:
16,17,18,18,19,19,21,21,21,22,22,22,24,25,28,29,30
A mode is the number that appears the most in a set of numbers. (I'm going to put the numbers in order before I solve this)
10, 13, 13, 24, 800
The answer is 13, because it appears more than any of the other numbers. :)
Hopefully this helps! If you have any more questions or don't understand, feel free to DM me, and I'll get back to you ASAP! :)