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AURORKA [14]
3 years ago
6

Karma baked 48 cookies yesterday. Every hour, she bakes another batch of 12 cookies. What is the rate of change for the scenario

described? 4 12 60 48
Mathematics
1 answer:
Alja [10]3 years ago
5 0
+8 x 5 - 12 i am not sure tho if it is supposed to be one i am sorry i can't really help you but ill look into it
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The average natural gas bill for a random sample of 21 homes in the 19808 zip code during the month of February was $311.90 with
Serhud [2]

Answer:

The 90% confidence interval for the true mean natural gas bill for homes in the 19808 zip code area in February is between $292.48 and $331.32

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 21 - 1 = 20

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 20 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.7247

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.7247\frac{51.60}{\sqrt{21}} = 19.42

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 311.9 - 19.42 = $292.48

The upper end of the interval is the sample mean added to M. So it is 311.9 + 19.42 = $331.32

The 90% confidence interval for the true mean natural gas bill for homes in the 19808 zip code area in February is between $292.48 and $331.32

3 0
3 years ago
Vernon writes −2 3/10 as a fraction using the same method he knows for positive mixed numbers. His work is shown: Multiply the w
love history [14]

Answer: no

Step-by-step explanation: to change a fraction back to a improper fraction

multiply the whole number by the denominator and then add it to the numerator but be careful with negative.  You can check this process by changing the improper fraction back to proper. If i change -17/10 i get -1 7/10.  the correct answer is -23/10.      

8 0
3 years ago
QUESTION ON PIC THANK YOU FOR ANSWERING
makvit [3.9K]

Answer:

- Parallelogram has two pairs of parallel sides.

- Square has four right angles, two pairs of parallel sides, and all sides congruent.

- Trapezoid has only one pair of parallel sides.

Step-by-step explanation:

5 0
2 years ago
If x−2=13, then what is the value of x2−4x+4?
Rus_ich [418]

Answer:

169

Step-by-step explanation:

x−2=13

First find the value of x

x-2+2 = 13+2

x = 15

Now substitute into the expression

x^2 -4x+4

15^2 -4*15+4

225 - 60+4

165+4

169

8 0
3 years ago
Read 2 more answers
-2.75 + 8.25 ? Help pls
Archy [21]
The answer is 5.5!!!!
3 0
3 years ago
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