Factor by grouping.x4 - 7x3 - 8x2 + 56x
A. (x3 - 8)(x + 7)
B. x(x2 + 8)(x - 7)
C. x(x2 - 7)(x - 8)
D. x(x2 - 8)(x - 7)
Answer: D
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Express the value of the inverse hyperbolic function in terms of natural logarithms.sech-1 
A. Undefined
B. ln 
C. ln 
D. ln 
Determine the type of curve from the given information.A projectile is fired horizontally from a cliff 1400 ft above the ground. The projectile's horizontal distance x and height y are given by 
and 
. If y is expressed as a function of x, what type of curve does this represent?
A. Parabola B. Hyperbola C. Ellipse D. None of the above
In a right triangle, find the length of the side not given. Let c represent the length of the hypotenuse. Give an answer to the nearest tenth if necessary.a = 30 cm, c = 50 cm
A. b = 20 cm B. b = 10 cm C. b = 80 cm D. b = 40 cm
Write the expression as the sum or difference of multiples of logarithms.loga 
A. 
loga x - 
loga y - 
loga z
B. 
loga x2 - loga y7 - loga z4
C. 
loga x - 
loga y + 
loga z
D. 2 loga x - 7 loga y - 4 loga z