Solve the linear equation.x - 21.9 = -13.1
A. {-35}
B. {8.8}
C. {35}
D. {-8.8}
Answer: B
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Find dy/dt.y = cos7(?t - 20)
A. 7 cos6(?t - 20) B. -7? cos6(?t - 20) sin(?t - 20) C. -7 cos6(?t - 20) sin(?t - 20) D. -7? sin6(?t - 20)
Solve the problem.A spherical water tank with an inner radius of 7 m has its lowest point 1 m above the ground. It is filled by a pipe that feeds the tank at its lowest point (see figure). Neglecting the volume of the inflow pipe, how much work is required to fill the tank if it is initially empty? Express the answer in terms of ?. 
A. 
? J
B. 
? J
C. 
? J
D. 
? J
Solve the problem.Heather has a 3-ft. square game board for a popular trivia game. What are the dimensions and the area of the board in inches?3 ft 
A. 36 in. by 36 in.; 72 in2 B. 3 ft. by 3 ft; 9 ft2 C. 3 in. by 3 in.; 9 in2 D. 36 in. by 36 in.; 1296 in2
Find the indicated trigonometric function of ?.
Find sec A and csc A.
A. sec A = 
; csc A = 
B. sec A = 
; csc A = 
C. sec A = 
; csc A = 
D. sec A = 
; csc A = 