Solve the problem.Five friends drove at an average rate of 60 miles per hour to a weekend retreat. On the way home, they took the same route but averaged 75 miles per hour. What was the distance between home and the retreat if the round trip took 10 hours?
A. 3000 mi
B. 333
mi
C. 5
mi
D. 666
mi
Answer: B
Mathematics
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Solve the problem. Round your answer, if appropriate.Water is discharged from a pipeline at a velocity v (in ft/sec) given by 
where p is the pressure (in psi). If the water pressure is changing at a rate of 
find the acceleration (dv/dt) of the water when 
A. 64.9 ft/sec2 B. 132 ft/sec2 C. 3,190 ft/sec2 D. 65.0 ft/sec2
Mathematics
Write the quotient in the form a + bi.
A. 
+ 
i
B. - 
+ 
i
C. - 
+ 
i
D. 
+ 
i
Mathematics
Solve the equation.(x - 7)2 = -144
A. {-7 - 12i, -7 + 12i}
B. 
C. {7i - 12, 7i + 12}
D. {7 - 12i, 7 + 12i}
Mathematics
?Solve the system of first-order linear differential equations given below.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics