Find the least common denominator for the following rational expressions.
18/r- 4, -5r/r^-5r+4, r+7/r^-4r-5
o (1-1)(r – 4)(r-5)
o (r - 1)(r + 4)(r-5)
0 (-1)(r+ 1)(r-4)(r-5)
(r- 1)(r+ 1)(r + 4)(-5)

(r-1)(r+1)(r-4)(r-5)

Step-by-step explanation:

C (r-1)(r+1)(r-4)(r-5)

Step-by-step explanation:

"a" determine whether sage found the correct quotient. show your work

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;