David rode his bicycle for 6 hours and he jogged for 8 hours during the past 2 weeks. If he continues bicycling and jogging at the same rate, how many hours will he ride his bicycle and jog in 24 weeks?

He will ride his bicycle for 72 hours and jog for 96 hours.

Step-by-step explanation:

David rode his bicycle for 6 hours and he jogged for 8 hours during the past 2 weeks.

We can say that per week, he rode his bicycle for 3hours and jogged for 4 hours.

Assuming that he continues at the same rate, in 24 weeks, he will ride his bike for:

24 * 3 = 72 hours

And he will jog for:

24 * 4 = 96 hours.

He will ride his bicycle for 72 hours and jog for 96 hours.

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;