Solve the problem.How many liters of a 20% alcohol solution must be mixed with 60 liters of a 90% solution to get a 50% solution?
A. 80 L
B. 140 L
C. 8 L
D. 14 L
Answer: A
Mathematics
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Solve the problem.On our moon, the acceleration of gravity is 1.6 m/sec2. If a rock is dropped into a crevasse, how fast will it be going just before it hits bottom 45 seconds later?
A. 72 m/sec B. -36 m/sec C. 3240 m/sec D. -72 m/sec
Mathematics
Find the first two nonzero terms of the Maclaurin expansion of the given function.f(x) = tan2 x
A. x + 
x2 + ...
B. 
- 2x + ...
C. x - 
x2 - ...
D. x2 + 
x4 + ...
Mathematics
Provide an appropriate response.What is the first step in solving the following formula for t?zt2 = kl - 3
What will be an ideal response?
Mathematics
Provide an appropriate response.The only consecutive whole numbers that are both prime numbers are and .
A. 1 and 2 B. 6 and 7 C. 2 and 3 D. 0 and 1
Mathematics