If the original cost of a tv is 1250.00 but decreases by 4.5% each week, how many weeks before the tv will cost 800.00?

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

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

What is x3+3x2−16x−48 divided by x−1?