Find the indicated sum.
+ 1 + 
+ . . . + 11
A. 
B. 
C. 99
D. 
Answer: B
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Parametric equations and and a parameter interval for the motion of a particle in the xy-plane are given. Identify the particle's path by finding a Cartesian equation for it. Graph the Cartesian equation. Indicate the portion of the graph traced by the particle and the direction of motion.x = 3 sin t, y = 2 cos t, 0 ? t ? 2?
A. 
+ 
= 1; Counterclockwise from
(3, 0) to (3, 0), one rotation
B. 
+ 
= 1; Counterclockwise from
(2, 0) to (2, 0), one rotation
C. 
+ 
= 1; Counterclockwise from
(0, 3) to (0, 3), one rotation
D. 
+ 
= 1; Counterclockwise from
(0, 2) to (0, 2), one rotation
Solve the problem.A wave produced by a simple sound is represented by the equation 
where P is measured in dynes per square centimeter at t seconds. Find P when t is 0.58 seconds.
A. 0.017 B. 0.029 C. 0.0056 D. 0.0058
Solve.The sales tax on the purchase of a tractor is $3395.42. If the tax rate is 7.9%, find the purchase price of the tractor.
A. $1,459,351.52 B. $46,375.42 C. $33,954.20 D. $42,980.00
Write a polynomial equation in standard form with the given solutions.-7, 6
A. x2 - 13x + 42 = 0 B. x2 + x - 42 = 0 C. x2 + 7x + 42 = 0 D. x2 - x - 42 = 0