By Michael Coldagelli. Due on Oct. 2nd, 11:59pm A chemist mixes a 12% acid solution with a 20% acid solution to
make 300 milliliters of an 18% acid solution. How many milliliters
of each solution does the chemist use?
a = amount of 12% solution (ml)
b = amount of 20% solution (ml)
Sa+b = 300
100||0.12a +0.20b = 54 12a + 20b = 5400

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.