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Nat2105 [25]
4 years ago
14

1: The number of pages read by Joy depends on the number of hours she spends reading a novel. ​The expression that represent the

above situation is p=20h+3 where h represents the number of hours she spends reading and p represents the number of pages that she has read. ​After reading for a total of 5 hours, the number of pages read by Joy is?
Mathematics
1 answer:
SSSSS [86.1K]4 years ago
5 0

The number of pages read by Joy in 5 hours is 103

<u>Explanation:</u>

Expression :

p = 20h + 3

where,

p is the number of pages

h is the number of hours

If Joy read the novel for 5 hours then the number of pages read by Joy would be

p = 20(5) + 3

p = 103

Therefore, number of pages read by Joy in 5 hours is 103

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Correct option is D) -0.6.

<u>Step-by-step explanation:</u>

We have sin\alpha  = -0.8 . Also, we know that cos\alpha  = \sqrt{1- (sin\alpha } )^{2} . Let's find out value of cos\alpha  using above formula:

cos\alpha  = \sqrt{1- (sin\alpha } )^{2}

⇒ cos\alpha  = \sqrt{1- (sin\alpha } )^{2}

⇒ cos\alpha  = \sqrt{1- (-0.8 } )^{2}

⇒ cos\alpha  = \sqrt{1- (0.64 } )^{}

⇒ cos\alpha  = \sqrt{0.36}

⇒ cos\alpha  = 0.6

But we know that cos\alpha is negative in third quadrant , Therefore cos\alpha  = -0.6.

Hence, correct option is D) -0.6.

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a sample of experienced typists revealed that their mean typing speed is 95 words per minute and the median typing speed is 77 w
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The pearson's coefficient of skewness is found as the 1.065.

<h3>What is termed as the coefficient of skewness?</h3>
  • The coefficient of skewness is a measurement used to evaluate the strength and direction of skewness in a sample distribution using descriptive statistics such as mean, median, or mode.
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Pearson skewness:

The skewness of the a data set is calculated by subtracting the mean from the median and dividing by the standard deviation.

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