Solve and check.7.7 = 5.5x
A. x = 14
B. x = 1.4
C. x = 0.14
D. x = 2.4
Answer: B
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Write the number in ordinary notation.7.0289 × 10-7
A. -702890,000 B. 0.000000070289 C. 0.00000070289 D. 0.0000070289
Solve the problem. Round results to an appropriate number of significant digits.A fire is sighted due west of lookout A. The bearing of the fire from lookout B, 
due south of A, is 
How far is the fire from B (to the nearest tenth of a mile)?
A. 20.9 mi B. 18.9 mi C. 21.9 mi D. 19.9 mi
Perform the indicated operation without the use of a calculator and express each answer in decimal notation.(3.5 × 10-5)(3 × 10-2)
A. 0.0105 B. 0.0000105 C. 10,500 D. 0.00000105
Use a graph to estimate the solution.The cost, T, in hundreds of dollars, of tuition at one community college is given by 
where c is the number of credits for which a student registers. Graph the equation and use the graph to estimate the cost of tuition if a student registers for 11 credits.
A. About $2300 B. About $1675 C. About $1500 D. About $2700