Pls with this. not sure how to do it

Asilkworm winds its cocoon out of one long silk fiber. to make silk thread, 3 to 10 of these silk fibers are unwound from their cocoons and combined into aa single thread with a typical length of 300 yards. choose a reasonable number of silk fibers in a thread write an equation to find the total length of the silk fibersused in 300 yards of the thread

Which of the following is an equation of a line parallel to the equation y=4x+1?

A11 gram sample of a substance that’s used to treat thyroid disorders has a k-value of 0.1247