??The number of ordered lists of 7 different items, chosen 4 at a time is 840.
?
A. ?True
B. ?False
Answer: A
Mathematics
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Solve the problem.A radio transmission tower is 150 feet tall. How long should a guy wire be if it is to be attached 12 feet from the top and is to make an angle of 21° with the ground? Give your answer to the nearest tenth of a foot.
A. 160.7 ft B. 147.8 ft C. 418.6 ft D. 385.1 ft
Mathematics
Find the indicated matrix.2A + B, where A = 
, B = 
A. 
B. 
C. 
D. 
Mathematics
Write an equation that expresses the relationship. Use k as the constant of variation.x varies jointly as the square of y and the square of z.
A. x + y2 + z2 = k B. x = ky2z2 C. xy2z2 = k D. x = k + y2 + z2
Mathematics
Multiply and simplify.
? 3b
A. 
b
B. 
C. 
D. 11b
Mathematics