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mr_godi [17]
3 years ago
7

Estimate a 20% tip on a dinner bill of $171.81 by first rounding the bill amount to the nearest ten dollars.

Mathematics
1 answer:
NARA [144]3 years ago
6 0
$34 is a proper 20% tip on a $171.81 dinner. Move the decimal point twice to the left, then multiply that twice.
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Question 9 - (3 marks available)
finlep [7]

Answer: a) 1,600

              b) 35,000

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<u>Step-by-step explanation:</u>

First, round each number to one significant digit (the first digit).

Then multiply them.

a) 17   --> rounds to 20

  82   --> rounds to 80

                                       20 x 80 = 2 x 8 with two zeros

                                                     = 1 6 0 0

b) 54   --> rounds to 50

  671   --> rounds to 700

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c) 207   --> rounds to 200

  643   --> rounds to 600

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