Find the largest open intervals where the function is concave upward.f(x) = x4 - 8x2 (exact values)
A. 
, 
B. 
C. 
D. None
Answer: A
Mathematics
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Use lattice multiplication to determine the product.73 × 80
A. 5840 B. 5850 C. 5940 D. 5830
Mathematics
Find the product and write the answer in simplest form. Assume variables represent nonnegative values.
? 
A. 
B. 
C. 
D. 
Mathematics
Find the quotient.
A. -18x2 B. -10x8 + 32x-6 C. -10x8 - 8x4 D. 40x-2 - 8x4
Mathematics
Find an equation of the parabola described.Focus at (-3, 0); directrix the line x = 3
A. y2 = 12x B. y2 = -12x C. y2 = -3x D. x2 = -12y
Mathematics