In a trivia competition, maribel had a score of 200 points. then she answered a few questions from the tv category and ended up with a grand total of 400 points l. what did maribel score on the tv questions?

If the tip varies directly with the number of guest which equation represents between the tip, t, and the number of guest, g?

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 ratio of the ages (in years) of three children is 2: 4: 5. the sum of their ages is 33. what is the age of each child?