Solve the problem.A physics exam consists of 9 multiple-choice questions and 6 open-ended problems in which all work must be shown. If a student must answer 6 of the multiple-choice questions and 4 of the open-ended problems, in how many ways can the questions and problems be chosen?
A. 1296
B. 261,273,600
C. 21,772,800
D. 1260
Answer: D
Mathematics
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Solve the problem.For the function f(x, y, z) = x2yz - 2yz2 + x at the point p = (1, -1, 1), find the unit vector for which f is increasing most rapidly.
A. 
i + 
j + 
k
B. 
i + 
j + 
k
C. 
i + 
j + 
k
D. 
i + 
j + 
k
Mathematics
Write the number as indicated.When the stock market went down in the Spring of 2000, Ellen lost two million, two thousand, 
dollars. Write the number using digits.
A. $2,200,073 B. $2,020,073 C. $2,002,073 D. $2,200,730
Mathematics
Perform the conversion. Round to the nearest tenth when necessary.9.5 cm to in.
A. 950 in. B. 3.7 in. C. 0.1 in. D. 24.1 in.
Mathematics
Simplify. Assume that all variables represent positive real numbers.
A. 
B. 
C. 5
D. 
Mathematics