Over 3 yr, lucia saved $550, $600, and $650 from baby-sitting jobs. the polynomial 550x3 + 600x2 + 650x represents her savings, with interest. after 3 yr. the annual interest rate equals x - 1. find the interest needed so that she will have $2000 after 3 yr.

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;

answer: i think one of the answer is $150 and $300?

step-by-step explanation:

step-by-step explanation: 2