1. The Johnson family went to the Olive Garden. The total was $73.28. If they leave a 20% tip, how much will the tip be?

$14.66

Step-by-step explanation:

Given parameters:

Total  = $73.28

  Percentage tip  = 20%

Unknown:

The amount of the tip = ?

Solution:

 The tip is the percentage of the total amount;

   Tip  = x 73.28  = $14.66

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

step-by-step explanation:

left be aligning the decimal points is required to not required see the number of digits to the right