Solve the equation.-15 = b - 1
A. b = 16
B. b = -16
C. b = -14
D. b = 14
Answer: C
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Find the mass of the wire that lies along the curve r and has density ?.C1: r(t) = (8 cos t)i + (8 sin t)j, 0 ? t ? 
;C2: r(t) = 8j + tk, 0 ? t ? 1; ? = 7t5
A. 
units
B. 
?5 units
C. 
?5 units
D. 
units
Write the name of the metric unit of measurement described.100 times a gram
A. centigram B. kilogram C. dekagram D. hectogram
Evaluate the integral.
Solve the problem.Softee Blankets charges $6 for shipping orders of $20 or less, $10 for orders from $20.01 to $70, and $15 for orders over $70. One week shipping charges for 510 orders totaled $5060. There were 40 more orders for $20 or less shipped than there were orders for over $70. Find the number of orders shipped at each rate.
A. $20 or less: 230; $20.01 to $70: 160; over $70: 120 B. $20 or less: 160; $20.01 to $70: 230; over $70: 120 C. $20 or less: 280; $20.01 to $70: 110; over $70: 120 D. The numbers cannot be determined from the given information.