Find the mass of the wire that lies along the curve r and has density ?.r(t) = 
i + 3tj, 0 ? t ? 1; ? = 4t
A. 2 units
B. 
units
C. 
units
D. 
units
Answer: D
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The number of sales calls made by certain employees during a special time span are given. 141, 137, 136, 135, 134, 132, 131, 130, 130, 130, 126, 125, 125, 124, 124, 122, 122, 121, 121, 119.Find the quartiles for the set of sales calls.
A. 133, 128, 123 B. 141, 130, 119 C. 141, 128.25, 119 D. 133, 130, 123
Write the point-slope form in slope-intercept form.y + 3 = -8(x - 2)
A. y = 8x + 12 B. y = -8x + 13 C. y = -8x + 11 D. y = -8x + 14
Fill in the blank with one of the words or phrases listed below. Some words or phrases may be used more than once.
logarithms are logarithms to base 10.
A. Inverse B. Common C. Exponential D. Natural
Solve the problem.An auto repair shop charged a customer $425 to repair a car. The bill listed $65 for parts and the remainder for labor. If the cost of labor is $40 per hour, how many hours of labor did it take to repair the car?
A. 9.5 hr B. 8 hr C. 10 hr D. 9 hr