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pochemuha
3 years ago
7

Suppose the constant rate of change of y with respect to x is -11.1 and

Mathematics
1 answer:
kramer3 years ago
3 0

Answer:

your are a fatherless child ligma nuz

Step-by-step explanation:

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In a random sample of microwave​ ovens, the mean repair cost was ​$ and the standard deviation was ​$. Using the standard normal
Semmy [17]

Complete Question

In a random sample of 13 microwave ovens, the mean repair cost was $90.00 and the standard deviation was $15.20. Using the standard normal distribution with the appropriate calculations for a standard deviation that is known, assume the population is normally distributed, find the margin of error and construct a 98% confidence interval for the population mean u. A 98% confidence interval using the t-distribution was (78.7,101.3). Compare the results. The margin of error of u is

Answer:

The value  is  E = 11.65

Step-by-step explanation:

From the question we are told that

    The sample is  n  = 13

     The sample mean is  \= x  =  \$ 90

     The standard deviation is  \sigma = \$ 15.20

      The  lower limit of the  98% confidence interval is a =  78.7

      The  upper  limit of the  98% confidence interval is b =  101.3

Generally the margin of error is mathematically represented as

        E = \frac{b-a}{2}

=>    E = \frac{ 101.3 - 78 }{2}

=>    E = 11.65

7 0
3 years ago
Need help on geometry Please
juin [17]
1. To find this we are going to use the converse of the Pythagorean theorem: if the square of the longest side of a triangle is equal to the sum of the squares of its smaller side, the triangle is a right one.
We know from our picture that the longer side of the triangle is 36 and its shorter sides are 24 and 15.
36^2=24^2+15^2
1296=576+225
1296 \neq 801
The converse also says that if the square of the longest side is greater than the sum of the squares of the shorter sides, the triangle is obtuse, and if the square of the longest side less than the sum of the squares of the shorter sides, the triangle is acute.
1296\ \textgreater \ 801 

We can conclude that our triangle is an obtuse one; the correct answer is the third one: obtuse

2. Here we have a right triangle with longer side 80 feet and one of the shorter sides 65 feet. Lest x be the distance from the base to the guy wire attached point.
Using the Pythagorean theorem:
80^2=65^2+x^2
x^2=80^2-65^2
x= \sqrt{80^2-65^2}
x=46.64

We can conclude that the correct answer is fourth choice: 46.64

3. Here we are going to use the Pythagorean theorem. We know that the longest side of our triangle is 40 and its shorter sides are 9 and x. Using the Pythagorean theorem:
40^2=9^2+x^2
x^2=40^2-9^2
x= \sqrt{40^2-9^2}
x=38.97

We can conclude that the correct answer is the fourth option: 38.97

5 0
3 years ago
Simplify 6 1/3-1 1/2=
Anna007 [38]
89/6 or 14,5/6 or 14.83 that 14 in the fraction is the whole number so it would go first then 5/6
8 0
3 years ago
What number is equivalent to |−27| ?
just olya [345]

The little bars on each side of the number -27 represent absolute value. This means that you must take the positive of the number inside the absolute value. In this case the positive of -27 is...

A. 27

Hope this helped!

I love Shawn Mendes. I'll marry him one day. You'll see

3 0
3 years ago
Read 2 more answers
Find the surface area <br> Please explain
Dmitriy789 [7]

Step-by-step explanation:

There are two trapezium(s), area of 2:

= 2 [½ x (sum of || sides) x height]

= 2[½ x (4 + 8) x 4.6 ] [not clearly visible if it is 4.5 or 4.6]

= 55.2 yd²

Area of vertically tilted rectangles

1): area = 5 x 4 = 20 yd²

2): area = 5 x 4 = 20 yd²

Total area = 20 + 20 = 40 yd²

Area of horizontal rectangles:

1): area = 4 x 8 = 32 yd² [upper]

2): area = 4 x 4 = 16 yd² [lower]

Area of given surface = 55.2 + 40 + 32 + 16 = 143.2 yd²

5 0
3 years ago
Read 2 more answers
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