Last year, for every 100 million vehicles that traveled on a certain highway, 50 vehicles were involved in accidents. If 5 billion vehicles traveled on the highway last year, how many of those vehicles were involved in accidents? (1 billion = 1,000,000,000)
Choose the correct choice from the following answers:  A) 800  B) 850  C) 900  D) 500  E) 1000
To solve we will set up a proportion. We know that “100 million vehicles is to 50 accidents as 5 billion vehicles is to x accidents”. To express everything in terms of “millions”, we can use 5,000 million rather than 5 billion. Creating a proportion we have:   100/50 = 5,000/x   Cross multiplying gives us:   100x = 2,000 * 50   x = 20 * 50= 
<gadget id="calculator">20 * 50</gadget>
<output>1_000</output>
1000   Answer : 1000
<result>E</result>
Last year, for every 100 million vehicles that traveled on a certain highway, 50 vehicles were involved in accidents. If 5 billion vehicles traveled on the highway last year, how many of those vehicles were involved in accidents? (1 billion = 1,000,000,000)