John uses a random number generator to simulate the results of a coin toss. he assigns the number 0 to heads and the number 1 to tails. if 600 numbers are generated, how many heads can he expect?
a.100
b.200
c.50
d.300

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.