Each week, Tim wants to increase the number of sit-ups he does daily by 2 sit-ups. The first week, he does 15 sit-ups each day.

Write a function in the form f(n)=mn+b to represent the number of sit-ups, f(n), Tim does daily in week n.
A. f(n)=n^2+15
B. f(n)=2n+13
C. f(n)=2n+15
D. f(n)=2n^2+15

19.side- angle- side

20. angle- side- angle

step-by-step explanation:

table 3 represents a direct variation function. : )

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step-by-step explanation:

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;