Baby talk: In a sample of 80 children, the mean age at which they first began to combine words was 16.81 months, with a standard deviation of 9.65 months. Construct a 95% interval for the mean age at which they first begin to combine words. Round the answers to two decimal places.

A 95% confidence interval for the mean age is

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

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.