Determine whether the given value is a solution to the given equation.
= 7.2; x = 61.2
A. Yes
B. No
Answer: A
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Perform the indicated operation and write the answer in lowest terms.
+ 
A. 
B. 
C. 
D. 
First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer.Mr. Buttimer took a plane trip for a total of 5.5 hours. He watched an in-flight movie for 1.84 hours. From the airport, he took a cab ride for 0.78 hour to the train station. Next, he took the train home for 1.98 hours. What was the total time spent traveling?
A. Estimate: 12 hours; exact: 10.1 hours B. Estimate: 11 hours; exact: 8.26 hours C. Estimate: 9 hours; exact: 8.26 hours D. Estimate: 11 hours; exact: 10.1 hours
Solve the problem.A survey of 7547 first-time vacationers showed that 53% more vacationers took their vacation in their own country rather than travel abroad. How many vacationers in the sample took their vacation abroad?
A. 2983 people B. 3547 people C. 49 people D. 7547 people
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 32,800?
A. 10 days B. 3 days C. 6 days D. 1 day