Answer:
20x⁸y¹⁰
Step-by-step explanation:
I put my explanation above. I hope you can give me brainliest. Thanks
Answer:
Step-by-step explanation:
you have to cancel the fraction stuff, distribute the exponent in the second term multiply, simplify like terms and then subtract the last term
it would take a very long time for me to explain all this and type it out so instead copy and paste this into mathpapa.com and it will explain it
\frac{4x^{-2}y^2}{2^{-3}x^2y^7}*(x^{-4}y^{-5})^{-3}-12x^8y^{10}
then let me know if you have any questions in the comments and I will answer
Hope this helps! :)
Answer:
x = -7
Step-by-step explanation:
This is an exponential equation.
We need to take log(or ln) of both sides and use logarithm property to solve this.
So, let's take ln of both sides, so we have:
Now, we will use this property shown below to further simplify:
So, we now have:
The value of x is -7
Answer:
The critical value that should be used is T = 2.0796.
The 95% confidence interval for the mean repair cost for the dryers is between $91.912 and $105.648.
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 = 22 - 1 = 21
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 21 degrees of freedom(y-axis) and a confidence level of . So we have T = 2.0796, which is the critical value that should be used.
The margin of error is:
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 98.78 - 6.868 = $91.912
The upper end of the interval is the sample mean added to M. So it is 98.78 + 6.868 = $105.648
The 95% confidence interval for the mean repair cost for the dryers is between $91.912 and $105.648.