Find the answer then find the appropriate number of significant figures

Twenty-five percent of the customers entering a grocery store between 5 p. m. and 7 p. m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

If f(x)=x+7 and g(x)=1/x what is (fog)(x)