We have given the number of successes and the sample size for a simple random sample from a population. in each case, do the following tasks.(a) determine the sample proportion. (b)decide whether using the one-proportion z-interval procedure is appropriate.(c) if appropriate, use the one-proportion z-interval procedure to find the confidence interval at the specified confidence level. x=40,n=50,95% level. x=3,n=100,99% level.

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a. the profit when the unit price is equal to 0b. the unit price(s) when the profit is equal to 0c. the profit when the unit price is greatestd. the unit price(s) when profit is greatest

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

The moats separating people from the animals are 5 m wide for lions and 4 m wide for the elephants. if the lion’s moat is 4 m deep, how deep should the elephants’ moat be?