. Four friends ate dinner at a restaurant. The bill was $51.89. They also left a $9 tip. Approximately what percent of the total bill did they leave as a tip?

Approximately 17%

Step-by-step explanation:

To find what percent 9 is of 51.89, you have to divide 9 by 51.89.

9/51.89 is 0.17344...

Since they said approximately, you can round 0.17344 to 0.17, which is equal to 17%.

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

: )

substitute,

circle 1 = 5

circle 2 = 20

circle 3 = 44

in this case no matter how you add, you will always get a perfect square..

hence proved

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