Select an algebraic expression for the verbal description.
?
The travel time for a plane traveling at a rate of r kilometers per hour for 600 kilometers
?
A. 600 - r
B. ?600r
C. ?
D. ?
E. ?600 + r
Answer: C
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Divide numerator and denominator by the highest power of x in the denominator to find the limit.
A. 
B. does not exist
C. 
D. 
In the circuit below, Vin = 20 V, R = 12 Kê, and C = 0.003 æF. Find fCO.
a. 2.8 KHz
b. 4.4 KHz
c. 8.3 KHz
d. 14 KHz
e. 84 KHz
Find all the zeros of the function and write the polynomial as a product of linear factors. ? x2 + 49 ?
A. 7i; (x + 7i)(x - 7i) B. -7i; (x + 7i)(x - 7i) C. ±7i; (x + 7)(x - 7) D. -7i; (x + 7)(x - 7) E. ±7i; (x + 7i)(x- 7i)
Solve the problem.The concentration of a certain drug in the bloodstream x hr after being administered is approximately 
Use the differential to approximate the change in concentration as x changes from 1 to 1.45.
A. 0.29 B. 0.62 C. 0.19 D. 0.30