Answer:
x = 30 degrees
Step-by-step explanation:
cos (x) = sqrt(3)/2
We need to take the inverse of each side
cos ^-1( cos x) = cos ^-1 (sqrt(3)/2)
x = cos ^-1 (sqrt(3)/2)
x = 30 degrees
In fraction form it would be 5/2
40-6=34 so he got 34/40 correct. 34/40= 85% so thats like a B...
She is correct you can just add the number you are trying to multiply various times like for example 3x32 it can just be 32+32+32