Running at their respective constant rates

Running at their respective constant rates, Machine x takes 2 days longer to produce w widgets than Machine Y. At these rates, if the two machines together produce 5w/4 widgets in 3 days, how many days would it take machine X alone to produce 2w widgets? A)4 B)6 C)8 D)10 E)12 I tried to use a differ...

(D) First opened in 1892, then rebuilt in 1900, the federal immigration station on Ellis Island processed nearly three quarters of all immigrants entering the United States in the first quarter of the twentieth century. Can someone explain the usage of two V-ed modifiers in D)? Doesn't "rebuil...

The hognose snake puts on an impressive bluff, hissing and rearing back, broadens the flesh behind its head the way a cobra does, feigning repeated strikes, but, having no dangerous fangs and no venom, eventually, if its pursuer is not cowed by the performance, will fall over and play dead. (A) bro...

Hi Guru, You mentioned that the usage of to have tasted is awkward and that we should use to taste. However, in the following sentence from an old version of OG, the correct choice B) makes the use of this construction. Could you explain why in this case we use to have recovered instead of to recove...