Solve the problem.The area of a rectangular wall in a classroom is 210 square feet. Its length is 9 feet shorter than three times its width. Find the length and width of the wall of the classroom.
A. width = 10 ft; length = 21 ft
B. width = 10 ft; length = 19 ft
C. width = 10 ft; length = 39 ft
D. width = 10 ft; length = 37 ft
Answer: A
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Use l'Hopital's Rule to evaluate the limit.
A. 5 B. 10 C. -5 D. -10
Determine what the next equation would be, and verify that it is indeed a true statement.(4 × 1) × (2 × 1) = 8(4 × 10) × (2 × 2) = 160(4 × 100) × (2 × 3) = 2400
A. (4 × 1000) × (2 × 4) = 3200 B. (4 × 1000) × (2 × 4) = 28,000 C. (4 × 1000) × (2 × 4) = 36,000 D. (4 × 1000) × (2 × 4) = 32,000
Find the unit ratio.40 to 30
A. 0.25
B. 1.
C. 0.75
D. 7.5
Solve the problem.If an earthquake has an intensity of I, then its magnitude, as computed by the Richter Scale, is given by 
where I0 is the intensity of a small, measurable earthquake. (Consider 
for this question.) If one earthquake has a magnitude 
on the Richter scale and a second earthquake has a magnitude 
on the Richter scale,
how many times more intense (to the nearest whole number) is the second earthquake than the first? A. 316,228 B. 681 C. 316,227,766,017 D. 2