Solve the problem.A certain object moves in such a way that its velocity 
after time t 
is given by 
Find the distance traveled during the first four seconds.
A. 39.0 m
B. 61.3 m
C. 73.3 m
D. 52.0 m
Answer: C
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Solve the problem.The width of a rectangle is 6 feet less than twice its length. If its area is 140 square feet, find the dimensions of the rectangle.
A. length: 10 ft; width: 14 ft
B. length: 3 ft; width: 
ft
C. width: 10 ft; length: 14 ft
D. length: 7 ft; width: 8 ft
Solve the problem.The number of bacteria growing in an incubation culture increases with time according to 
where x is time in days. Find the number of bacteria when 
and 
.
A. 6800 bacteria; 81,600 bacteria B. 6800 bacteria; 550,800 bacteria C. 20,400 bacteria; 550,800 bacteria D. 6800 bacteria; 183,600 bacteria
Solve the equation. Write the answer in a + bi form.z2 + 1 - 
i = 0
A. 6 - 2i, -6 - 2i
B. 
+ 
i, - 
- 
i
C. 
+ 
, - 
- 
D. 
- 
, - 
+ 
Fill in the blank with one of the words or phrases listed below.
In a 
, the numerator or denominator or both may contain fractions.
A. rate B. rational expression C. complex fraction D. proportion