Nice App Inc. wants to provide a special digital reward for users that spend more than $10,000 in the first year of using their new app. In order to estimate how many of the app users will qualify, they decide to perform a study. How many customers would they need to survey to estimate the proportion of users who would qualify for this reward with a 1.5% margin of error? Use a confidence level of 99%. You will need to survey users of the app.

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

well what did you do it matters what you did : )

step-by-step explanation:

oof

step-by-step explanation:

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c