Hi, I think what you need to do is multiply 21 x 4 x 1/3. If you need help multiplying there’s a helpful website called Calculator Soup that is very helpful.
Let M = amount of money in ATM at the beginning
M - 18(100) = M - 1800
The change is a decrease of $1,800
This is the answer (−1.550510257)
X = 68
Since the angle opposite of it is a right angle, we know that 22 + x has to equal 90 also.
So just take 90 - 22 = 68 degrees
