Solve.How many lines are determined by 18 points, no 3 of them being collinear?
A. 2448
B. 306
C. 18
D. 153
Answer: D
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Solve the problem.Imagine a large tank with cross-sectional area A. The bottom of the tank has a circular drain with cross-sectional area a. Assume the tank is initially filled with water to a height h(0) = H. The height of the water as it flows out of the tank is described by the equation 
where 
and 
is the acceleration due to
gravity. Find the water height function for 
Then determine the approximate time at which the tank is first empty. If necessary, round to two decimal places.
A. h(t) = (1.2 - 0.2t
)2; 1.36
B. h(t) = (1.2 - 0.1t
)2; 2.71
C. h(t) = (1.2 - 0.1t
)2; 3.83
D. h(t) = (1.2 - 0.2t
)2; 1.92
Provide an appropriate response.The primary advantage(s) of the weighted-average inventory method is/are:
A. the time savings compared to finding the exact price for each item B. all pertain to the weighted-average inventory method C. its use with goods that are similar in cost D. its use with goods that have a relatively stable cost
Graph the line containing the given pair of points and find the slope. (-6, 0) (0, -1) 
A. 6
B. - 
C. -6
D. 
Find the mode or modes (if any).95, 36, 32, 36, 29, 95
A. 95, 36 B. 36 C. 53.8 D. 95