Express the graph shown using interval notation. Also express it as an inequality involving x.
A. [3, 7]
3 ? x ? 7
B. (3, 7]
3 < x ? 7
C. [3, 7)
3 ? x < 7
D. (3, 7)
3 < x < 7
Answer: A
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Solve the problem. Round your answer to 2 decimal places when necessary.The population of a certain country is about 105 million. The overall birth rate is 19.9 births per 1000. Approximately how many births were there in the country?
A. 20,900 births B. 20.9 million births C. 2.09 million births D. 209,000 births
Evaluate the derivative at the given value of x.y = -3x2 + 5x; x = 7
A. -22 B. -147 C. -7 D. -37
Provide an appropriate response.Simplify: 
+
+ 
What will be an ideal response?
Provide an appropriate response.The value of an investment of $1000 earning 8% compounded yearly is given by A = 1000(1.08)t, where t is the number of years it has been invested .If the amount of your investment is now $4000, how long has it been invested?
What will be an ideal response?