What is the graph of 2x + 3y > -3

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Each unit cost 14p, how much would 942 units cost?

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.