4.36 question to get a b in? math, alexandria pappas must average 80 on five tests. scores on the first four tests were 8282? , 7878? , 8282? , and . what is the lowest score that she can get on the last test and still get a? b

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!