Find the square root.- 
A. 21
B. -220
C. -21
D. Not a real number
Answer: C
Mathematics
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Find the requested partial derivative.(?w/?z)x,y at 
= 
if 
A. 48 B. 38 C. 33 D. 28
Mathematics
Solve the problem.The concentration c (in mg/L) of a certain drug in the bloodstream is found to be 
where t is time (in h) after the drug is taken. Find dc/dt.
A. 
B. 
C. 
D. 
Mathematics
Evaluate the improper integral or state that it is divergent.
A. 0
B. 
C. - 
D. Divergent
Mathematics
Solve the problem.Find the amount to be repaid on a loan of $2400 at a simple interest rate of 6% for 7 years. Use the simple interest formula 
A. $3408 B. $17,808 C. $3749 D. $103,200
Mathematics