How do I find the functions here?

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

6x - 8 = 16 solve the following equation. then place the correct number in the box provided.

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4