?Solve 
for t. Round your answer to four decimal places.
?
A. ?1.4454
B. ?0.3611
C. ?2.6344
D. ?0.3614
E. ?2.7184
Answer: D
You might also like to view...
Verify the identity.cos 4? = 2 cos2(2?) - 1
What will be an ideal response?
Simplify the expression. Assume that all variables are positive when they appear.
A. -4x12y18 B. 16x8y12 C. -4x8y12 D. 4x8y12
Find the center of the ellipse.
+ 
= 1
A. (20, 0) B. (0, 0) C. (20, 12) D. (0, 12)
Tank A contains 80 gallons of water in which 20 pounds of salt has been dissolved. Tank B contains 30 gallons of water in which 5 pounds of salt has been dissolved. A brine mixture with a concentration of 0.5 pounds of salt per gallon of water is pumped into tank A at the rate of 4 gallons per minute. The well-mixed solution is then pumped from tank A to tank B at the rate of 6 gallons per minute. The solution from tank B is also pumped through another pipe into tank A at the rate of 2 gallons per minute, and the solution from tank B is also pumped out of the system at the rate of 4 gallons per minute. The correct differential equations with initial conditions for the amounts, x(t) and y(t), of salt in tanks A and B, respectively, at time t are Select the correct answer. ?
A. 
B. 
C. 
D. 
E. 