Since we know there are π radians in 180°, then how many radians are there in 153°?
The second one would be the answer. You want to plug in for this question. You can divide over the five leaving you with (x-2)^2 =25. Since you are squaring this answer, you want to get either 5 or negative five. Both -3 and 7 will do that.
I think it might be C or B I'm honestly not 100% sure.
In 1975 it was 1000tons, ok, well, in 1976 it went up by 10%, how much is a 10% increase?

well, in 1976 it was 1100 tons then, and in 1977 it went down by 5% of 1100, well, if we take 1100 to be the 100%, then what is a 5% decrease?