Answer:
cos 60° = 1/2 because the angles are complements.
Step-by-step explanation:
We have been given that a colleague has been tutoring six students in 11th grade to prepare for the ACT. Student scores were as follows: 20, 18, 16, 15, 23, 20. We are asked to find the mean of the ACT scores.
We will use mean formula to solve our given problem.




Upon rounding to nearest whole number, we will get:

Therefore, the mean of the ACT scores is 19 and option 'c' is the correct choice.
The three geometric means between 3 and 512 are…
8, 32, 128
OR
-8, 32, -128
The area is 1680 ft. squared