How does an economist calculate gdp for one year using the expenditure approach?
a. add together all the amounts spent on final goods and services.
b. add up all the incomes received.
c. add the amounts spent on goods and services to the incomes received.
d. subtract the amounts received as income from the goods and services.

(select all that apply) examples of email use that could be considered unethical include denying receiving an e-mail requesting that you work late forwarding a chain letter asking for donations to a good cause sending a quick message to your friend about last weekend sending your boss the monthly sales figures in an attachment setting up a meeting with your co-worker sharing a funny joke with other employees

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

Which is the most compelling reason why mobile advertising is related to big data?