Shanna wants to build a simple lean-to In her back yard. Where the ground Is level, she finds a stralght tree perpendicular to the ground. She leans a sheet of plywood against the tree at a 30-degree angle off the tree. If the
plywood Is 7 feet long, how far away is the base of the plywood from the tree?

45

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;

answer is 33

step-by-step explanation:

27 +27 or 27times 2=54

the diffrence is 0