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Paha777 [63]
3 years ago
5

Assume that a set of test scores is normally distributed with a mean of 70 and a standard deviation of 10. In what percentile is

a score of 65?
1. 95th
2. 79th
3. 46th
4. 30th
Mathematics
1 answer:
vlabodo [156]3 years ago
3 0
Given:
μ = 70, the mean
σ = 10, the standard deviation

The random variable is x = 65.
Calculate the z-score.
z = (x - μ)/σ = (65 -70)/10 = - 0.5

From standard ables, obtain
P(x<5) = 0.3085 ≈ 30%
The score of 65 is in the 30th percentile.

Answer: 30th
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Kaylee has 2 gallons each of red and blue paint, and 1 gallon each of orange and green paint. She paints her bedroom with these
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Answer:

3( 73/84 )left over

Step-by-step explanation:

She had 6 gallons in total

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   With mixed numbers:

2  11/84  

3  73/84

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8 0
3 years ago
Kate can mow lawns at a constant rate of 45 lawns per hour. How many lawns can Kate mow in 20 hours?
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4 0
2 years ago
Can someone please help me workout this problem? If the quotient obtained by dividing 8x^4 - 2x^2 + 6x - 7 by 2x+1 is equal to 4
Angelina_Jolie [31]

Answer:

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Step-by-step explanation:

Data

Dividend = 8x⁴ - 2x² + 6x - 7

Divisor    = 2x + 1

Quotient = 4x³ + px² - qx + 3

Process

1.- Divide using long division

                                4x³ - 2x² + 3                          

                   2x + 1   8x⁴ + 0x³ - 2x² + 6x - 7

                             - 8x⁴ - 4x³

                                 0   - 4x³ - 2x²

                                      + 4x³ +2x²

                                          0       0   + 6x - 7

                                                          -6x - 3

                                                             0 - 10    Remainder

         px² = -2x²  then  p = -2

         -qx = 6x     then q = -6

5 0
2 years ago
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Answer:

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8 0
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