Water flows from a tank of constant cross-sectional area 50 
through an orifice of constant cross-sectional area 1/4 located at the bottom of the tank. Initially, the height of the water in the tank was 20 ft, and t sec later it was given by the equation 
. How fast was the height of the water decreasing when its height was 2 ft?
a. 
ft/sec
b. 2/25 ft/sec
c. 
ft/sec
c. ft/sec
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Convert the units using two or three unit fractions.5
tons = 
oz
A. 86 B. 10,750 C. 172,000 D. 107,500
Identify the triangle as scalene, isosceles, or equilateral.
A. Isosceles B. Equilateral C. Scalene
Subtract.(0.5x4 - 0.6x2 + 0.5) - (2.8x4 + 4.4x - 1.4)
A. -2.3x4 - 0.6x2 - 4.4x + 1.9 B. -2.3x4 - 0.6x2 - 4.4x - 0.9 C. -2.3x4 - 0.6x2 + 4.4x + 1.9 D. -2.3x4 - 0.5x2 - 0.9
Solve the problem.A stone thrown downward with an initial velocity of 44.1 m/sec will travel a distance of s meters, where 
and t is in seconds. If a stone is thrown downward at 44.1 m/sec from a height of 254.8 m, how long will it take the stone to hit the ground? Round your answer to the nearest second.
A. 9 sec B. 17 sec C. 13 sec D. 4 sec