Step-by-step explanation:
p1=7
p2=10
p3=13
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Step-by-step explanation:
a. The point estimate is the mean, 47 days.
b. The margin of error is the critical value times the standard error.
At 31 degrees of freedom and 98% confidence, t = 2.453.
The margin of error is therefore:
MoE = 2.453 × 10.2 / √32
MoE = 4.42
c. The confidence interval is:
CI = 47 ± 4.42
CI = (42.58, 51.42)
d. We can conclude with 98% confidence that the true mean is between 42.58 days and 51.42 days.
e. We can reduce the margin of error by either increasing the sample size, or using a lower confidence level.
The answer is 1/2 because 4yd = 12 ft. so the ratio would be 6 to 12 then you simplify to 1/2
be the common difference between terms in the sequence 
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-th term in the sequence is