Need with these few questions. givin' thirty points and brainliest if all scored correctly.

The weight of the object on Venus is 84 kg.  The distance the ant can travel in 4 min is 20 m.  The amount of the bonus after selling 7 cars is $455.  

Step-by-step explanation:

These questions all explain relationships between two quantities that are directly proportional.  This means that the ratio of the two values remains the same.  For example, in question 3, the weight of an object on Venus varies directly with its weight on Mercury.  So, their ratio is written as V/M, or 108/45.  Since we want to know what the weight is on Venus if it is 35 on Mercury, we set up a proportion and solve for the missing variable using cross-multiplication and division:  (108/45) = (x/35) -- 45x = 3780, divide both sides by 45, gives us x = 84.  Question 4 is similar:  M/Min = 7.5/1.5 so (7.5/1.5) = (x/4) -- 1.5x = 30 -- x = 20.  Question 5:  Bonus/Cars = 325/5 so (325/5) = (x/7) -- 5x = 2275 -- x = 455.