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MAXImum [283]
2 years ago
7

Barbara answered 72 questions correctly on her test. If her score on the test was 80%, how many questions were on the test?

Mathematics
2 answers:
Pani-rosa [81]2 years ago
5 0
Answer is B - 90
-----
elena55 [62]2 years ago
5 0
For a percentage question setup is like this:
part = percentage * whole

part = 72
percentage = 80% = 0.8

72 = 0.8 * whole
whole = 72/0.8 = 90
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Find the error and then find the correct answer.​
qaws [65]

Answer:

  • w = 3

Step-by-step explanation:

<u>The correct one is given below:</u>

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<u>+5            + 5</u>

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2 years ago
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kenny6666 [7]
Amswer the first one
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3 years ago
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Dimas [21]

Answer:

0.150 < (Proportion of Sandy's pie) < 0.167

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Step-by-step explanation:

Total percentage of pie = 100% or 1

George, Sandy, Carlos, and Michelle all ate a piece of the pie.

George ate a fraction of 0.150

Michelle ate a fraction of (1/6) = 0.167

Carlos ate a fraction of (1/7) = 0.143

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And Sandy is known to eat more than two of her friends, but less than one of them.

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Hence, it is evident that Sandy ate more than 0.143 and 0.150 (Carlos and George) but less than Michelle (0.167).

So, mathematically, the possible proportion of cake that Sandy ate is

0.150 < (Proportion of Sandy's pie) < 0.167

Hope this Helps!!!

7 0
2 years ago
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