Find an equation of the line containing the given pair of points(2, 7) and (-3, 1)
A. y = - 
x + 
B. y = - 
x + 
C. y = 
x + 
D. y = 
x + 
Answer: D
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For the curve r(t), find an equation for the indicated plane at the given value of t.r(t) = (t + 7)i + (ln(cos t) - 8)j + 5k, -?/2 < t < ?.2; rectifying plane at t = 
.
A. 
(x - (1 + 7)) = 0
B. 
+ 
= 0
C. - 
+ 
= 0
D. 
- 
= 0
Solve.A window washer accidentally drops a bucket from the top of a 64-foot building. The height h of the bucket after t seconds is given by 
When will the bucket hit the ground?
A. 32 sec B. 4 sec C. -2 sec D. 2 sec
Solve.An archer has $116 to spend on a new archery set. A certain set containing a bow and three arrows costs $51. With the purchase of this set, he can purchase additional arrows for $5 per arrow. Use an inequality to find the maximum number of arrows he could obtain, including those with the set, for his $116.
A. at most 
arrows
B. at most 13 arrows
C. at most 16 arrows
D. at most 
arrows
Solve the problem.The hydrogen ion concentration of a substance
is about 5.2 x 10-7 moles per liter. Find the pH. Round to the nearest tenth. Use the formula pH = -log [H+].
A. 6.6 B. -7.7 C. 6.3 D. 7.7