CPhill

The "feet" were on the duck....!!!!!

Actually, zegroes, there was some "brute force" required in my answer.....I just thought it was an interesting pattern......LOL!!!

Something like this...????

Notice the pattern, Melody

64^15 mod 391  = 4

64^59mod 391 = 4

64^103mod 391 = 4

Which leads us to believe that this pattern repeats every 44th power

Therefore

64^(15 + 44n)mod 391 = 4 for all positive integers, n

So

64^(15 + 44*5)mod 391  = 64^(15 + 220)mod 391 = 64^(235)mod 391  = 4 ....!!!

In this quadrant, if tangent Θ = -2, then y = 2 and x = -1 and r =√5

Then, cos2Θ = cos^2Θ - sin^2Θ

And we have

cosΘ = -1/√5      sinΘ = 2/√5     ....  so ....

cos^2Θ - sin^2Θ =

1/5 - 4/5   =   -3/5   = -.6

Let x be the number Louis has

The, since Jake and Zack have the same number, we have

2x = 5x - 60       subtract 2x from both sides, add 60 to both sides

60 = 3x             divide by 3 on both sides

20 = x  =  the number that Louis has....

Thanks, Mel.....!!!

Using dimensional analysis, we have

158,000 ft x .3048m/1 ft x 1km/1000m = 48.1584 km

Just as NotTheBestMathMaster found ....!!!!

.2222......  (repeating)

Sorry, Anonymous....the answer might be "105," but we don't have enough info to solve this......all we could find using the info given is the distance from the base of the high rise down the street to Simon's observation point.....