Find the largest open intervals where the function is concave upward.f(x) = x2 + 2x + 1
A. (-1, ?)
B. (-?, -1)
C. None
D. (-?, ?)
Answer: D
Mathematics
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Use implicit differentiation to find dy/dx.
= x2 + y2
A. 
B. 
C. 
D. 
Mathematics
Solve and graph.|x - 12| > 3
A. {x
-15 < x < -9}, or (-15, -9)
B. {x
x > 15}, or (15, ?)
C. {x
9 < x < 15}, or (9, 15)
D. {x
x < 9 or x > 15}, or (-?, 9) ? (15, ?)
Mathematics
Solve the equation.(m - 5)2/3 - 3(m - 5)1/3 - 10 = 0
A. {3, 0} B. {0, 7} C. {3, 130} D. {-3, 130}
Mathematics
Solve. Express the result in scientific notation. If necessary, round the decimal factor to two decimal places.In a state with a population of 9,000,000 people, the average citizen spends $6,000 on housing each year. What is the total spent on housing for the state?
A. $54 × 1011 B. $5.4 × 1010 C. $54 × 1010 D. $5.4 × 109
Mathematics