The answer isn't obvious to a student uncomfortable with percentages and/or algebra, so a detailed solution may be in order: We have been given that The new paycheck equals 100% of PriorPaycheck plus a raise of another another 3% of PriorPaycheck, We know is the new paycheck...

Let R be the rate of the largest pump so 2R/3 is the rate for each smaller pump. Assume an arbitrary volume, V, for the tank. Let T1 be the time to fill the tank with the large pump.      T1 x R =V --> T1 = V/R The effective rate for all 4 pumps is  ...

1.18 is is clearly the ratio twi integers118 and 100 and thus is rational. Rational numbers can't be irrational. The naturural, whole, and integers numbers can all be used directly for counting. 1.18 not so much. So rational is the only one of the listed sets to which 1.8 belongs.

Kelly, I have no diagram to go by but the transversal of a line forms 4 angles, two pairs  of alternate internal angles. Let's pick a line, c will do, unless <5 is formed where transversal cuts through d. The crossing creates four angles,  including <5.  ...