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iren [92.7K]
3 years ago
11

Michelle got 23 out of 30 questions correct on her quiz. To find out what her percent correct is, Michelle should:

Mathematics
1 answer:
vladimir1956 [14]3 years ago
7 0

Answer:

To find the percentage use the formula B. Take 30 divided by 23 and then multiply by 100.

Step-by-step explanation:

23/30 x 100 = 76.666% or 77% if rounded to the nearest whole number

Hope this helps

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Step-by-step explanation:

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Read 2 more answers
A blue boat and a red boat are on the same side of a lake and are 18 miles apart. The blue boat is 30 miles from a lighthouse on
rewona [7]

9514 1404 393

Answer:

  • red boat distance: 42 miles
  • angle at lighthouse: 22°

Step-by-step explanation:

The Law of Cosines can be used to find the distance from the red boat to the lighthouse.

  b² = l² +r² -2lr·cos(B)

  b² = 18² +30² +2·18·30·cos(120°) = 1764

  b = √1764 = 42

The distance from the red boat to the lighthouse is 42 miles.

__

The angle at the lighthouse can be found using the law of sines.

  sin(L)/l = sin(B)/b

  L = arcsin(l/b·sin(B)) = arcsin(18/42·sin(120°)) ≈ 21.79°

The angle between the boats measured at the lighthouse is about 22°.

8 0
3 years ago
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