Numa loja, há caixas e caixotes. sabendo-se que 4 caixotes e 1 caixa pesam 29 quilogramas e que 5 caixotes e 3 caixas pesam 45 quilogramas, qual é o peso de cada caixote e de cada caixa?

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.

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.

The minimum height for riding on the super screaming spinner at the theme park is 52 inches. which of the following expressions shows the height to ride?