Next step would be 5x10x5
In calculating interest by the previous balance method, purchases and payments during the month are not counted in calculation of interest.
Answer: The proportion of oil tankers that had spills is
or 0.329.
Step-by-step explanation:
Since we have given that
Number of tankers is drawn = 474
Number of tankers did not have spills = 318
Number of tankers have spills = 474 - 318 = 156
Proportion of oil tankers that had spills is given by

Hence, the proportion of oil tankers that had spills is
or 0.329.
360/12 = 30deg...so the arguments are multiples of 30deg.