Aspen can work 25 math problems in 12 and half minutes. how long will it take her to work 38 problems?

Assuming her rate is constant, we can write the proportion

... (12.5 minutes)/(25 problems) = m/(38 problems) . . . m represents the time needed

Multiplying by 38 problems, we get

... m = (38/25)*12.5 minutes = 19 minutes

It will take Aspen 19 minutes to work 38 problems.

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;

your mom

step-by-step explanation: