Find the least common denominator for the expression.
- 
A. 21a3
B. 4a2
C. a3
D. 4a3
Answer: D
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Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation.3 + 12 + 27 + . . . + 108
A. 
B. 
C. 
D. 
Solve the problem.Yosemite Falls in California consists of three sections: Upper Yosemite Fall (by itself one of the ten highest waterfalls in the world), the Middle Cascade, and Lower Yosemite Fall. From a footbridge across the creek 2500 feet from the falls, the angles of elevation to the top and bottom of Upper Yosemite Fall are 45.74° and 24.42°, respectively. How high is the total series of three falls? How high is Upper Yosemite Fall? Round your answers to the nearest foot.
Fill in the blank(s) with the appropriate word(s).
Find the exact value of the expression.
A. 
B. 
C. - 
D. - 
Indicate whether the value of x shown is a solution to the given equation.
= 
, x = 
A. No B. Yes