The Beach Side surf shop and the Waves surf shop kept receipts for the number of surfboards they rented over a period of two years. Surfboards Rented

Year Beach Side Wave
2014 2,345 2,216
2015 1,196 1,891
Which statements about the number of surfboards rented are true? Select all that apply.
A.
More surfboards were rented in 2014 than 2015.
B.
In 2015, the Beach Side surf shop rented fewer surfboards than Waves.
C.
In 2015, the Beach Side surf shop rented more surfboards than Waves.

D.
The Waves surf shop rented fewer surfboards in 2015 than in 2014.

Part B

How many more surfboards were rented in 2014 than in 2015 by both shops?

A. 3,541
B. 1,474

nlgqer

step-by-step

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;

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours