Last year, for every 100 million vehicles that traveled on a certain highway, 80 vehicles were involved in accidents. If 4 billion vehicles traveled on the highway last year, how many of those vehicles were involved in accidents? (1 billion = 1,000,000,000)	Select the correct option.
A) 1600
B) 3200
C) 800
D) 400
E) 200
To solve we will set up a proportion. We know that “100 million vehicles is to 80 accidents as 4 billion vehicles is to x accidents”. To express everything in terms of “millions”, we can use 4,000 million rather than 4 billion. Creating a proportion we have:   100/80 = 4,000/x   Cross multiplying gives us:   100x = 4,000 * 80   x = 40 * 80= 
<gadget id="calculator">40 * 80</gadget>
<output>3_200</output>
3200   Answer : 3200
<result>B</result>
Last year, for every 100 million vehicles that traveled on a certain highway, 80 vehicles were involved in accidents. If 4 billion vehicles traveled on the highway last year, how many of those vehicles were involved in accidents? (1 billion = 1,000,000,000)