Express as a single logarithm and, if possible, simplify.
ln x - ln 7
A. ln
B. ln(
- 7)
C. ln 
D. ln
Answer: A
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Solve the problem.A piece of land is shaped like a right triangle. Two people start at the right angle of the triangle at the same time, and walk at the same speed along different legs of the triangle. If the area formed by the positions of the two people and their starting point (the right angle) is changing at 
then how fast are the people moving when they are 
from the right angle? (Round your answer to two decimal places.)
A. 5.00 m/s B. 2.00 m/s C. 0.50 m/s D. 1.00 m/s
The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 1 for r(t) = t5i + 5ln
j + 
k
A. a(1) = 20i - 5j - 2k
B. a(1) = 20i + 
j + 2k
C. a(1) = 20i + 
j - 2k
D. a(1) = 20i + 5j + 2k
Verify the identity.sin 
= -cos x
What will be an ideal response?
Use reference angles to find the exact value of the expression. Do not use a calculator.csc 1020°
A. - 
B. - 
C. - 
D. - 