The cost of downloading a book from a certain website is $5.99. The cost of downloading a video is $7.99. Tatum's mom downloads
2 answers:
The easiest way to answer this question is by rounding $5.99 and $7.99 to $6.00 and $8.00. Then multiply 3 by 6 and 5 by 8. 
. Now to find the exact answer, seeing as $5.99 is 1 cent away from $6.00 and $7.99 is one cent away from $8.00, we can do 
and 
, we can see that $49 is 8 cents over. From there we subtract the 8 cents from the $49 and see that the amount she spent on downloads was $48.92.
You might be interested in
Complete Question
Answer:
a
b
Step-by-step explanation:
From the question we are told that
The sample size is n = 60
The first sample mean is
The second sample mean is
The first variance is
The first variance is
Given that the confidence level is 95% then the level of significance is 5% = 0.05
Generally from the normal distribution table the critical value of is
Generally the first standard deviation is
=>
=>
Generally the second standard deviation is
=>
=>
Generally the first standard error is
Generally the second standard error is
Generally the standard error of the difference between their mean scores is mathematically represented as
=>
=>
Generally 95% confidence interval is mathematically represented as
=>
=>