Dave loves under water diving. his house boat is 250 feet above sea level. he jumped from that level. he went 600 feet below sea level. how many feet did dave go under the water?

600 feet

Step-by-step explanation:

The question says "How many feet did Dave go under the water", many people may think that the answer is 850 feet, but remember that, at the beginning, he was 250 feet above the sea level, meaning that in those 250 feet, he was not under the water level.

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;