Determine whether the expression represents a difference of two squares.x2 - 16
A. Yes
B. No
Answer: A
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Find the magnitude of u × v and the unit vector parallel to u × v in the direction of u × v.u = - 
i + 
j + k, v = i + j + 2k
A. 2
; - 
i + 
j - 
k
B. 2
; 
i + 
j - 
k
C. 8; 
i - 
j - 
k
D. 8; 
i - 
j + 
k
Simplify the polynomial answer and write it in descending order.Consider the square that has a side length given by (6a - 11) feet. Find the area of the square.(6a - 11) ft 
A. The area is 6a2 + 121 square feet. B. The area is 36a2 + 121 square feet. C. The area is 36a2 - 132a + 121 square feet. D. The area is 6a2 - 132a + 121 square feet.
Solve.A projectile is thrown upward so that its distance above the ground after t seconds is 
After how many seconds does it reach its maximum height? Round to the nearest second.
A. 27 sec B. 36 sec C. 11 sec D. 9 sec
The base of a 52-ft ladder leaning against a wall begins to slide away from the wall. At the instant of time when the base is 48 ft from the wall, the base is moving at the rate of 9 ft/sec. ? How fast is the top of the ladder sliding down the wall at that instant of time? ?
A. 20.9 ft/sec B. 21.6 ft/sec C. 26.5 ft/sec D. 17.2 ft/sec