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The value of U.S. trade with China from 1994 through 2004 can be approximated by

C(t)= 3t^2-7t+50 billion dollars where t is measured in years since 1994.

6) Find C(4):

a) 98

b) 56

c) 38

d) 50

e) None of the above.

7) Which of the following statements is the best interpretation of C(4)?

a) The value of U.S. trade with China in billions of dollars.

b) The value of U.S. trade with China in billions of dollars in 1994.

c) The value of U.S. trade with China in billions of dollars in 1998.

d)The amount that the value of U.S. trade with China was increasing per year in

1994.

e)The amount that the value of U.S. trade with China was increasing per year in

1998.

8) What is the average rate of change of the function between 1996 and 1998?

a)48

b)22

c)17

d)11

e)5

9) Which of the following statements is the best interpretation the answer to problem number 8?

a)The value of U.S. trade with China in billions of dollars.

b)The value of U.S. trade with China in billions of dollars in 1996.

c)The value of U.S. trade with China in billions of dollars in 1998.

d)The amount that the value of U.S. trade with China increased per year, on average, between 1996 and 1998.

e)The amount in billions of dollars that the value of U.S. trade with China increased per year, on average, between 1996 and 1998.

I got: E,B,D,A. Yes or no?

First, I plugged 4 in the function I got: C(t)=48-28+50 which is 70. so I got none of the above. as for the second part about my interpretation, thats just what i think.

for 8) i plugged in 2 first so got 12-14+50 which is -48 then plugged iin 4 and got 48-28+50 which is 70 . subtract those and its 22. which is B.

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# Homework Help: Word problem about function

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