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Maru [420]
2 years ago
12

80 POINTSSSSS

Mathematics
1 answer:
Semenov [28]2 years ago
7 0

Answer:

Tawny Eagle

Step-by-step explanation:

<u>Percent Change Formula</u>

\sf percent\:change=\dfrac{final\:value-initial\:value}{initial\:value} \times 100

<u>African Fish Eagle</u>

Given:

  • Initial population = 32,800
  • Final population = 43,952

\implies \sf percent\:change=\dfrac{43952-32800}{32800} \times 100=34 \%

<u>Tawny Eagle</u>

Given:

  • Initial population = 7,900
  • Final population = 10,981

\implies \sf percent\:change=\dfrac{10981-7900}{7900} \times 100=39 \%

<u>Solution</u>

Therefore, the Tawny Eagle species saw a larger percent increase to their population over the last 8 years.

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Here are the total scores of 10 students in an introductory statistics course.
cestrela7 [59]

Answer:

Kindly check explanation

Step-by-step explanation:

Given that :

Mean (m) = 72

Standard deviation (sd) = 10

Grading cutoff policy:

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next 30% receive B

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Standardized score for grade cutoff:

Locating the Zscore for the proportions on the z table :

Bottom 5% = 0.05 ; corresponding Zscore = - 1.645

next 15% receive D = (5 +15)% 0.20 ; corresponding Zscore = - 0.84

next 35% receive C = (20+35)% = 0.55 ; corresponding Zscore = 0.13

next 30% receive B = (55 + 30)% = 0.85 ; Corresponding Zscore = 1.04

B) Give the cutoffs in terms of actual total scores.

Recall:

Zscore = (x - m) /sd ; where x = actual score

x = sd*z + m

For F:

10*(-1.645) + 72 = 55.55

For D:

10*(-0.84) + 72 = 63.6

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10*(0.13) + 72 = 73.3

For B:

10*(1.04) + 72 = 82.4

C) Do you think that this method of assigning grades is a good one?

Yes, it is good in terms of expressing scores around the mean such that score below are negative and those above are positive. However, it is a little bit ambiguous.

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Please help and show work
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3 years ago
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Answer and Step-by-step explanation:

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-2 ∈ W is FALSE. W's only made up of whole numbers and not their negated equivalents.

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3 years ago
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