100*2.2=220
80*2=176
220+176=396
So the two trains will take 2.2 hours so that they are 396 miles apart.
Answer: the percent of the students at this university are foreign = 30%
Step-by-step explanation:
Given: Probability that college students are foreign students who also smoke: P(S|F)=0.12
Probability that foreign college students smoke P(S∩F)=0.4
The probability that the students at this university are foreign :
[By conditional probability formula]

Hence, the percent of the students at this university are foreign = 30%
(-1,x) you didnt say how many units up
The answer is 0.746 because thousands is the third number after the decimal point and you are rounding up because 7 is greater than 5
Answer is 750
Explanation; because 500 + 250 = 750