Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(7
)(4
)
A. 280
B. 2800
C. 280
D. 28
Answer: C
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Find, if possible, AB and BA.A = 
B = 
A. AB = 
, BA = 
B. AB = 
, BA = 
C. AB = 
, BA = 
D. AB = 
, BA = 
Solve the problem.The temperature T (in °C) at which a certain integrated circuit is designed to operate is given by the inequality 
? 12. What are the minimum and maximum temperatures of this range?
A. T ? 122 B. 122 ? T ? 134 C. 98 ? T ? 122 D. T ? 98 or T ? 122
Solve the problem.The number of bacteria growing in an incubation culture increases with time according to 
where t is time in days. After how many days will the number of bacteria in the culture be 8,396,800?
A. 1 day B. 10 days C. 6 days D. 5 days
A cell site is a site where electronic communications equipment is placed in a cellular network for the use of mobile phones. The numbers of cell sites from 1985 through 2008 can be modeled by 
where t represents the year, with 
corresponding to 1985. Use the model to find the numbers of cell sites in the year 2007 .
? A. 211,071 B. 209,071 C. 208,071 D. 207,071 E. 210,071