Two marathon runners run the full distance of the marathon, approximately 26 miles, in 4 hours. About how many miles did they run in 1 hour?

Approximately 6.5 miles

Step-by-step explanation:

If the marathon runners ran 26 miles in 4 hours, you would have to divide 26 by 4 since it's asking how many miles per 1 hour they ran.

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;

18.8cm hope i at all

step-by-step explanation: