If you want to take 20% off $9, you must find 80% of $9. As 100% - 20% = 80%.
80% turns out to be 4/5, 8/10 or 0.8.
8/10 x 9
= 72/10
= 7.2
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Answer:
$7.20
You can write it as: 40,048,000,000
Answer:
[(12+24)*7]/2=126. + area of circle. πr²/2= 72*3=216
Step-by-step explanation:
the answer is 342 if we assume valume of π to 3
The total number of handshakes was 234.
- The first man shook hands with 12 other men.
- The second man shakes hands with 11 other men, as he had already shaken hands with the first man.
- Like-wise, the last man does not need to shake hands again as every man has already shaken hands with him in their respective turns.
- The number of handshakes among men is 0 + 1 + 2 + … + 12.
- The sum of "n" natural numbers = (n)(n+1)/2
- The number of handshakes among men is 12(13)/2.
- The number of handshakes among men is 78.
- Each man shakes hands with every woman except his spouse.
- Each man shakes hands with 12 other women.
- The number of handshakes between men and women is 13*12.
- The number of handshakes between men and women is 156.
- The total number of handshakes is 78 + 156.
- The total number of handshakes is 234.
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