If an individual receives 1.8 mgy while standing 4 ft from a source of radiation for 2 minutes, which of the following option(s) will most effectively reduce his or her radiation exposure to that source of radiation?
a standing 3 ft from the source for 2 minutesb standing 8 ft from the source for 2 minutesc standing 5 ft from the source for 1 minuted standing 6 ft from the source for 2 minutes

The average cost of one year at a private college in 2012-2013 is $43,289. the average grant aid received by a student at a private college in 2012-2013 is $15,680.   what is the average student contribution for one year at a private college in 2012-2013?

1. which of the following is a search engine? a) mozilla firefox b)internet explorer c)google d)safari 2. which of the following statements is true? a) all search engines will provide the same results when you enter the same query. b) all search engines use the same amount of advertisements. c) some search engines are also browsers. d) search engines often provide different results, even when you enter the same query.

Idon’t understand the double8 coding problem. it is java