Explain mathematical induction step by step in the most simple way possible please.- Precalc problem: Pn: 1+2+2^2+2^3+. . . +2^n-1=2n

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

i would say b) is your answer

sorry if im wrong

step-by-step explanation:

answer: it depends on what the tax percentage

320ft

step-by-step explanation:

120 divided by 3 equals 40

40 times 4=160

160 times 2=320