The cost C, in dollars, to remove p percent of a certain pollutant
May 10, 2016
GMAT OFFICIAL GUIDE PS Solution: The cost to remove 90 percent of the pollutant is determined by letting p = 90 in the cost formula: 100,000(90)/(100 – 90) = …
Author: Scott Woodbury-Stewart
The figure shown above represents a modern painting…
May 10, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given a painting that has 4 different colored rectangles, each with a length of l and a width of w. We are …
In a recent election, Ms. Robbins received 8,000 votes cast by
May 9, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given that Ms. Robbins received 8,000 votes from independent voters and 10% of votes cast by non-independent voters. We are also given …
If a( a + 2) = 24 and b( b + 2) = 24
May 9, 2016
GMAT OFFICIAL GUIDE PS Solution: To solve, we must determine the values of a and b. We are given a(a+2) = 24 So: a^2 + 2a – 24 = …
If x/y = c/d and d/c = b/a…
May 9, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given two equations: 1) x/y = c/d 2) d/c = b/a Let’s now test the expressions in the Roman numerals to determine …
The function f is defined by f(x) =…
May 9, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given the function defined by f(x) = √x – 10, and we also see that f(t) = u. First, let’s determine what …
Pumping alone at their respective constant rates, one inlet pipe fills…
May 9, 2016
GMAT OFFICIAL GUIDE PS Solution: To solve, we want to use the combined worker formula: work of pump 1 + work of pump 2 = total work completed Let’s …
Which of the following expressions can be written as an integer
May 9, 2016
GMAT Official Guide Solution: Let’s simplify the expressions in each Roman numeral to see which of them must be an integer. I. (√82 + √82)^2 (2√82)^2 4 x 82 …