A500 point drop in the djia was a big drop when the djia was at 2,246 in october, 1987 and a much smaller drop when the djia reached 11,421 in september, 2008. the percent by which stock prices fall is a more meaningful measure. the lesson here is that . a. it is easy to make a mistake calculating a percent. b. the djia is a categorical variable. c. confidentiality has been violated. d. rates are often more meaningful than counts.

sorry can't

step-by-step explanation:

i googled though and something came up but it was in science langueage not common english sooo

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour

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