Solve the problem.Rectangle A is 20 by 50. Rectangle B is a gnomon to rectangle A. The dimensions of rectangle B are
A. 50 by 125.
B. 20 by 50.
C. 50 by 105.
D. 40 by 50.
E. none of these
Answer: C
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Answer the following statement(s) true (T) or false (F)
1. The area of a 45°–45° triangle with leg length 2 inches is the same as the area of a square with leg length ?2 inches. 2. Surface area may be expressed in centimeters. 3. The surface area of a rectangular prism is the sum of the areas of the six rectangles which form its faces. 4. The volume of any pyramid is the product of one-half the area of the base and its height.
Find the mean of the random variable x associated with the probability density function over the indicated interval.
?
; 
?
A. ?
B. ?
C. ?
D. ?
E. 
Solve the problem.Mardi received an inheritance of $50,000. She invested part of it at 12% and the rest at 11%. Her total annual income from the investments was $5900. Find the amount invested at 12%.
A. $40,000 B. $20,000 C. $44,100 D. $39,000
Write the percent as a decimal.85%
A. 8.5 B. 0.74 C. 0.085 D. 0.85