Help would be very greatly appreciated

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%