In the next year, an economist in a particular nation believes that exports will have a mean of 165 and a standard deviation of 15 (in millions of dollars). In addition, he believes that imports will have a mean of 80 and a standard deviation of 13 (in millions of dollars). Finally, he believes that the correlation between imports and exports will be -0.36. Define the trade balance as exports minus imports. Find the mean and the standard deviation of the trade balance (in millions of dollars).

Which of the following are considered needs? check all that apply

Acountry made education free in mandatory up to age 15. it is established 100 new schools to educate kids across the country. as a result, citizens acquired the _ required to work. the school's generated _ for teachers and other staff. in 20 years, to countryside rapid _ and its gdp.

Lillypad toys is a manufacturer of educational toys for children. six months ago, the company's research and development division came up with an idea for a unique touchscreen device that can be used to introduce children to a number of foreign languages. three months ago, the company produced a working prototype, and last month the company successfully launched its new device on the commercial market. what should lillypad's managers prepare for next? a. increased competition from imitators b. a prolonged period of uncontested success c. a sharp decline in demand for the product d. a difficult struggle to move from invention to innovation