Solve.Using the chessboard parable, find the total number of grains when all squares up to and including 18 are filled.
A. 262,143 grains
B. 34 grains
C. 131,072 grains
D. 65,536 grains
Answer: A
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Use a calculator to find the acute angle between the planes to the nearest thousandth of a radian.7x + 6y + 10z = -4 and 6x + 4y + 10z = -2
A. 0.142 rad B. 1.433 rad C. 1.060 rad D. 1.429 rad
Factor the trinomial completely. If the trinomial cannot be factored, say it is prime.2r6 - 6r5 - 20r4
A. (2r3 + 4)(r - 5) B. 2r4(r - 2)(r + 5) C. 2r4(r + 2)(r - 5) D. (2r3 + 10)(r - 2)
Solve.The average value of a certain type of automobile was $14,640 in 1,992 and depreciated to $6,120 in 1,996. Let y be the average value of the automobile in the year x, where x = 0 represents 1,992. Write a linear equation that relates the average value of the automobile, y, to the year x.
A. y = -2,130x + 6,120
B. y = - 
x - 6120
C. y = -2,130x + 14,640
D. y = -2,130x - 2,400
Find the numbers at which f is continuous. At which numbers is f discontinuous?f(x) = -4 cos x
A. continuous for all real numbers B. continuous for all real numbers except x = -4 C. continuous for all real numbers except x = 1 D. continuous for all real numbers except x = 0