Write the following as a rate in lowest terms.10 tests for 40 students
A. 
B. 
C. 
D. 
Answer: A
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Find all the first order partial derivatives for the following function.f(x ,y, z) = (sin xy)(cos yz2)
A. 
= (y cos xy)(cos yz2); 
= (z2 sin xy)(sin yz2)- (x cos xy)(cos yz2); 
= 2(yz sin xy)(sin yz2)
B. 
= (y cos xy)(cos yz2); 
= (x cos xy)(cos yz2); 
= -2(yz sin xy)(sin yz2)
C. 
= (y cos xy)(cosyz2); 
= (x cos xy)(cos yz2) - (z2 sin xy)(sin yz2); 
= -2(yz sin xy)(sin yz2)
D. 
= (y cos xy)(cos yz2); 
= (x cos xy)(cos yz2) - (z2 sin xy)(sin yz2); 
= 2(yz sin xy)(sin yz2)
Solve the problem.Evaluate the expression 3x + 6 when x = 8 by replacing the variable with the number 8. Compute the result.
A. 30 B. 18 C. 9 D. 48
Solve the equation by completing the square.5x2 + 22x = -15
A. 
B. 
C. 
D. 
Solve.A rock falls from a tower that is 122.5 m high. As it is falling, its height is given by the formula 
How many seconds will it take for the rock to hit the ground (h=0)? Round to the nearest tenth.
A. 3100 sec B. 11.1 sec C. 25 sec D. 5 sec