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Butoxors [25]
3 years ago
14

Carlton spent $21.85 on lunch for himself and a friend. About how much should he leave for a 15% tip?

Mathematics
2 answers:
ASHA 777 [7]3 years ago
8 0

Answer:  $3.25

Step-by-step explanation:

10% of $21.85 = $2.19

5% is half of the 10% which is $1.10

$2.19 + $1.10 = $3.29 or a better estimate is $3.25

madreJ [45]3 years ago
5 0

Answer:

about $3.28 or $3.30 (rounded up)

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2 years ago
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8 0
2 years ago
A random sample of 20 purchases showed the amounts in the table (in $). The mean is $49.57 and the standard deviation is $20.28.
son4ous [18]

Answer:

The 98​% confidence interval for the mean purchases of all​ customers is ($37.40, $61.74).

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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3 0
3 years ago
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