The sales tax in one state is 7%. write a function rule for finding the total cost of an item with selling price x. then find the total cost of a cd player with a selling price of $150. a. f(x) = x – 7; $148.93 c. f(x) = 7 + x; $151.07 b. f(x) = 0.07x; $10.50 d. f(x) =1.07x; $160.50

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)