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DedPeter [7]
3 years ago
11

A recent report shows that 62% of people are interested in black holes. If this number is down from the previous year by 8%, wha

t was the percent of people who were interested last year?
Mathematics
1 answer:
Likurg_2 [28]3 years ago
7 0

Answer: The percent of people who were interested in black holes last year was 70%.

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

  • People interested in black holes this year: 62%

If the number is down from the previous year by 8%, to calculate the percent of people who were interested last year we simply have to add the 8% loss to the actual 62 %.

So, mathematically speaking:

  • 62%+8%=70%

In conclusion, the percent of people who were interested in black holes last year was 70%.

Feel free to ask for more if it´s necessary or if you did not understand something.

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P, Q & R form a right-angled triangle.
Naya [18.7K]

Answer:

m<RPQ = 22°

Step-by-step explanation:

Given:

m<SRQ = 90°

PS = PQ

m<SQR = 46°

Required:

m<RPQ

Solution:

m<SQR + m<SRQ + m<RSQ = 180°

Substitute

46° + 90° + m<RSQ = 180°

m<RSQ = 180° - 136°

m<RSQ = 44°

Find m<PSQ:

m<PSQ = 180° - m<RSQ (Angles on a straight line

m<PSQ = 180° - 44° (Substitution)

m<PSQ = 136°

Find m<RPQ:

∆QSP is an isosceles triangle with two equal base angles. Therefore:

m<RPQ = ½(180° - 136°)

m<RPQ = 22°

4 0
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A box contains 100 colored chips; some are violet and some are red. Wilson chooses a chip at random, records the color, and plac
Dmitriy789 [7]
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g A test was conducted to determine if there is a difference between Canadian and American average heart rates. A group of 36 Ca
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Answer:

The test statistic  | t |  =4.45

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given that the first sample size n₁ = 36

Given that the second sample size n₂ = 34

Mean of the first sample x₁⁻ = 68.5

Mean of the second sample x₂⁻ = 70

<u><em>Step(ii):-</em></u>

Test statistic

       t = \frac{x^{-} _{1}-x^{-} _{2}  }{\sqrt{S^{2} (\frac{1}{n_{1} }+\frac{1}{n_{2} }  } )}

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The test statistic  | t | = |-4.45| =4.45

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