Identify the place value of the underlined digit.1.9
39
A. Hundreds
B. Hundredths
C. Ten-thousandths
D. Tenths
Answer: B
Mathematics
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Solve the problem.The height of the water, H, in feet, at a boat dock t hours after 7 A.M is given by 
, where t is time measured in seconds. Find the period.
A. 
B. 170
C. 
D. 170?
Mathematics
Find the length of the indicated portion of the trajectory.r(t) = (1 + 4t)i + (1 + 7t)j + (2 - 2t)k, -1 ? t ? 0
A. 
B. 
C. 2
D. 
Mathematics
Perform the indicated operation. Simplify if possible.
- 5x
A. 
B. 
C. 
D. 
Mathematics
Identify the equation as either an identity or not.sin ? sec ? = cos ? csc ?
A. Not an identity B. Identity
Mathematics