Each class is making a friendship chain the length of the school gym, for the end of year party. The fifth grade class has of their chain finished. The sixth grade class has to of
theirs finished. How much more of the sixth grade chain is finished than the fifth grade
chain?

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

read more on -

step-by-step explanation:

30005

yes ok                                            

b, i believe, but not sure.