Solve the problem.The following table shows the July electric bill of selected homes in Cincinnati along with the number of rooms in each home. 
Find the equation of the line of best fit for the number of rooms and the electric bills, and use it to predict the bill for a home with 11 rooms.
A. y = 11.8x + 43; $168
B. y = 12.1x + 44; $177
C. y = 12.1x + 47; $163
D. y = 10.2x + 51; $178
Answer: B
Mathematics
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Calculate the simple interest and the final balance. Round to the nearest cent, if necessary.
A. Interest: $350; Final Balance: $650 B. Interest: $382; Final Balance: $682 C. Interest: $360; Final Balance: $660 D. Interest: $376; Final Balance: $676
Mathematics
Solve the problem.Walt made an extra $9000 last year from a part-time job. He invested part of the money at 10% and the rest at 7%. He made a total of $780 in interest. How much was invested at 7%?
A. $5000 B. $7000 C. $4500 D. $4000
Mathematics
Solve the equation.ln 
= 7
A. 
B. {e7 - 6}
C. {e14 - 6}
D. {e14 + 6}
Mathematics
Find the exact value by using a half-angle identity.tan 
A. 2 + 
B. -2 + 
C. -2 - 
D. 2 - 
Mathematics