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trapecia [35]
3 years ago
7

4. The rental for a television set changed from $80 per year to $8 per month

Mathematics
1 answer:
Olegator [25]3 years ago
6 0

Answer:

16%

Step-by-step explanation:

rental charge per year = $80

rental charge at the rate $8 per year = 8 * 12 = 96

the increased amount = 96 - 80 = 16

% = 16 / 100 = 16%

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A new phone system was installed last year to help reduce the expense of personal calls that were being made by employees. Befor
Zolol [24]

Answer:

a. $302

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

\mu = 400, \sigma = 50

Point in the distribution below which 2.5% of the PCE's fell.

This is the 2.5th percentile, which is X when Z has a pvalue of 0.025. So it is X when Z = -1.96.

Z = \frac{X - \mu}{\sigma}

-1.96 = \frac{X - 400}{50}

X - 400 = -1.96*50

X = -1.96*50 + 400

X = 302

4 0
2 years ago
The average low temperature by month in Nashville is represented by the function
malfutka [58]

Answer:

<h2>33</h2>

Step-by-step explanation:

Given the average low temperature by month in Nashville is represented by the function  f(x)=-1.4x² + 19x +1.7, where x is the month, the average rate of change is expressed as d[f(x)]/dx = 2(1.4x) + 19

d[f(x)]/dx  = 2.8x + 19

Since the number of months between March and August is 5 months and x is in months, hence we will substitute x = 5 into the resulting function to get  the average rate of change from March to  August as shown;

d[f(x)]/dx  at x = 5

= 2.8(5)+ 19

= 14 + 19

= 33

<em>Hence the average rate of change from March to August is 33</em>

4 0
2 years ago
Which graph represents a linear function? A coordinate plane is shown with a way line beginning along the x axis and continuing
Sliva [168]
<span><span>-2-2 + 2 = 0(-2, 0)</span><span>-1-1 + 2 = 1(-1, 1)</span><span>00 + 2 = 2(0, 2)</span><span>11 + 2 = 3(1, 3)</span><span>22 + 2 = 4<span>(2, 4)</span></span></span>
5 0
2 years ago
Read 2 more answers
Joseph drove to Carly’s house for dinner. He was away from his house for 2 hours. He spent 50minutes at Carly’s house. Driving t
Klio2033 [76]

70 miles

Hope this helps

-Millie

7 0
2 years ago
The table below shows the population of a town over x years. A 2-column table with 5 rows. The first column is labeled years wit
mel-nik [20]

Answer:

10,346.0(1.1)^x

112,096 people

Step-by-step explanation:

edg

8 0
2 years ago
Read 2 more answers
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