Sue's monthly earnings consist of a monthly salary and a 4 percent commission on the portion of her monthly sales that is in excess of $2,000. If Sue's monthly salary was the same in July as in August, how much greater were her sales in July than in August?

(1) Sue's monthly earnings were $3,620 in July and $3,580 in August.

(2) Sue's monthly salary was $3,500 in July and in August.

In the same period of time that a sports car traveled 120 miles, a truck traveled 100 miles. What was the truck's average speed during this period of time?

(1) During the first 30 minutes, the sports car traveled 30 miles.

(2) The truck's average speed was 10 miles per hour less than the sports car's.

Julian had five indoor potted plants, each of which - in order to survive - only needed to be watered once in a certain number of days. That number was not the same for all five plants. Julian last watered the plants - all of them - at noon on a Monday. He left home that Thursday and returned the following Thursday at noon. None of the plants were watered while Julian was away, and none of them died from any cause except lack of watering. At least one plant was alive when Julian returned. How many were alive in all?

(1) Exactly two plants were such that they would have survived only if Julian had watered them on the day he left home.

(2) Three plants were identical in terms of watering needs.

Of the 40 researchers at a certain company, 60 percent work on project P and 30 percent work on project Q. How many of the researchers at the company work on project P but not on project Q ?

(1) 4 of the researchers at the company work on project Q but not on project P.

(2) 12 of the researchers at the company do not work on either project P or project Q.

Lauren wants to assemble a collection of books with fish-themed titles by shopping at her local bookstore. On the bookstore's website, she searched for the keyword fish. The search returned only the results shown in the table. From the copies in stock included in the search results, Lauren purchased 4 books with distinct titles from 4 different sections with an average (arithmetic mean) price of more than $12.00.

For each of the following statements, select Yes if the statement is true about the purchase that Lauren made. Otherwise, select No.

If , then . Given that 1+7+7²+⋯+7⁸=6,725,601, what does 7⁹ equal?

Machine K and Machine N, working simultaneously and independently at their respective constant rates, process of the shipment of a certain chemical product in 1.6 hours. Then machine K stopped working, and Machine N, working alone at it's constant rate, processed the rest of the shipment in 2 hours. How many hours would it have taken Machine K, working alone at its constant rate, to process the entire shipment?

If x is a real number and (x+5)(x-3) is a negative real number, then the value of which of the following expressions must also be a negative number?

I. 3-x

II. 3x - 7

III. (x+7)(x-3)

If x² > y², then

Which of the following fractions has a decimal equivalent that is a terminating decimal?