To get a b in math, alexandria pappas must average 80 on five tests. scores on the first four tests were 84 , 74 , 83 , and 79. what is the lowest score that she can get on the last test and still get a b?

If she gets a 78, her average would be a 79.6, rounding up to a "b", but without rounding and getting a solid 80, she would have to get an 80 on her next test. (the answers given are positive integers (no decimals) by the way)