One of the oldest devices used for calculation is the abacus, as shown in the sample figure. Each rod names one of the positions we use in counting. Each bead on the bottom represents one unit in that column and each bead on the top represents 5 units in that column. The number illustrated in the sample figure below is 1,734.
?
Sample 
?
Choose an abacus to show 10,905.
?
A
B
?
?
C
D
?
A. C
B. B
C. D
D. A
E. none of these
Answer: A
You might also like to view...
Evaluate the expression.
3
A. 
B. 3
C. 
D. 
Write the sum or difference as a product containing only sines and/or cosines.sin(2?) - sin(4?)
A. -2 sin ? cos(3?) B. 2 sin(3?) cos ? C. 2 cos(2?) cos(3?) D. -2 sin ?
Solve the problem.P(x) = -x3 + 
x2 - 60x + 100, x ? 5 is an approximation of the total profit (in thousands of dollars) from the sale of x hundred thousand tires. Find the number of hundred thousands of tires that must be sold to maximize profit.
A. 5.5 hundred thousand B. 5 hundred thousand C. 4.5 hundred thousand D. 4 hundred thousand
For the pair of functions, find the quotient function or functional value indicated. Give any x-values that are not in the domain of the quotient function.Find 
(x).f(x) = 10x2 + 43x + 28g(x) = 2x + 7
A. 
(x) = 5x - 4; - 
B. 
(x) = 5x + 4; 
C. 
(x) = 5x - 4; 
D. 
(x) = 5x + 4; - 