Answer:
1728
Step-by-step explanation:
first, you have to add the total number of cans they collected each hour.
second,you have to multiply the number of hours by your answer for step 1.
Let the angle be x.
Hence, its complement is 90 - x.
x = 3* (90 - x) - 70 = 270 - 3x - 70 = 200 - 3x
4x = 200
x = 50
Thus, the angle is 50°.