Find the length of the following curve.y = 
, for -ln 3 ? x ? ln 3
A. 
B. 
C. 
D. 
Answer: D
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Find the arc length parameter along the curve from the point where t = 0 by evaluating 
r(t) = (etcos t)i + (etsin t)j + 5etk
A. 
et - 3
B. 
et - 
C. 3
et - 
D. 3
et - 3
Write the inverse of the statement.If the moon is out, then we will start a campfire and we will roast marshmallows.
A. If the moon is not out, then we will not start a campfire or we will not roast marshmallows. B. If the moon is not out, then we will start a campfire but we will not roast marshmallows. C. If we do not start a campfire or we do not roast marshmallows, then the moon is not out. D. If we start a campfire and we roast marshmallows, then the moon is out.
150 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean ? = 65 and standard deviation ? = 10.Approximately what percent of the students scored between 65 and 75 points?
A. 34% B. 10% C. 68% D. 95% E. none of these
Solve the problem. Round money to the nearest cent, if necessary, rates to the nearest whole percent, and time to the nearest month.If $145.83 in interest is paid on a loan at 7% for 5 months, what is the principal?
A. $4999.89 B. $1000 C. $7000 D. $4200