Solve. Remember to insert units when writing your answer.Four years ago, John planted a tree in his garden. It was 3 ft 10 in. tall. Since then the tree has grown 6 ft 7 in. How tall is the tree now?
A. 9 ft 5 in.
B. 10 ft 5 in.
C. 10 ft 7 in.
D. 9 ft 17 in.
Answer: B
Mathematics
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The CEO of a tire company has kept records for the profit P when n tires are produced. The rate of change 
is the marginal profit. The graph of marginal profit is shown. If the current rate of production is 180 tires, what effect on profit will an increase in production have?
?
??
A. Profits will be increased. B. Profits will remain the same. C. Profits will be reduced. D. None of the above
Mathematics
Express the sum in sigma notation.- 
+ 
- 
+ 
- 
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation. Simplify the result, if possible.
- 
A. 
B. 
C. 
D. 
Mathematics
Evaluate the expression. Write your answer without negative exponents.120
A. 12 B. -1 C. 0 D. 1
Mathematics