Find the percent of increase or decrease
1. Original amount $450
new amount $639
2. Original amount $200
new amount 175
3. Original amount $60
new amount $42
4. Original amount $720
new amount $864
5. Original amount $124
new amount $93
6. Original amount $3,200
new amount $3,448

Write as a product of 2 binomials and a monomial (factor out as much as possible from each binomial). ! i do not understand, any is appreciated : ) whoever gets the best answer recieves brainliest and points! (4x–12x²)(16y³+12y²)

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.