Find the length of the indicated portion of the trajectory.r(t) = (etcos t)i + (etsin t)j + 3etk, -ln 2 ? t ? 0
A. 
B. 
C. 
D. 
Answer: D
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Write the fraction in lowest terms.
A. 
B. 
C. 
D. 
Use the distributive property to multiply. Then, if possible, simplify the resulting expression.4(a + b)
A. 4ab B. 8ab C. 4a + 4b D. 4a + b
For the given initial investment, simple interest rate, and time of investment, find the total value of the investment. Round to the nearest cent.$6000 at 4% for 18 months
A. $9600.00 B. $6360.00 C. $10,320.00 D. $360.00
Solve the problem. It costs $350 to charter a bus for a ski trip. It also costs $400 per student for all other expenses including food, lodging, ski rental, and lift tickets. Let P(n) represent the per student cost (in dollars) to go on the trip if n students go on the ski trip. By finding an equation for P(n), determine how many students need to go on the trip so that the per person cost is no more than $420.
A. at most 18 students B. at least 17 students C. at most 17 students D. at least 18 students