Identify the figure.
D?C
A. line segment, 
or 
B. ray, 
C. ray, 
D. line, 
or 
Answer: D
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Find the curvature of the curve r(t).r(t) = (2 + cos 10t - sin 10t)i + (2 + sin 10t + cos 10t)j + 2k
A. ? = 5
B. ? = 
C. ? = 
D. ? = 5
Perform the operation using trigonometric form. Write the answer in the form a + bi(
- i)(i)
A. 1 + 
i
B. 
C. i
D. 
+ i
Solve the problem.At a garage sale, the most expensive item was marked $25.00 more than the cheapest item. The sum of the two items was $26.90. Find the cost of the least expensive item.
A. $3.80 B. $26.90 C. $22.10 D. $1.90
Solve.A chemist needs 110 milliliters of a 50% solution but has only 30% and 85% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
A. 40 mL of 30%; 70 mL of 85% B. 80 mL of 30%; 30 mL of 85% C. 30 mL of 30%; 80 mL of 85% D. 70 mL of 30%; 40 mL of 85%