Write the ratio in lowest terms.7 feet to 6
feet
A. 
B. 
C. 
D. 
Answer: B
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Identify the given number as "Rational", "Irrational", or "Not a real number". If the number is rational, give its exact value. If the number is irrational, give a decimal approximation to the nearest thousandth.- 
A. Rational, -11 B. Not a real number C. Irrational, -60.500 D. Irrational, -11.000
Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists.x + y + z= 7x - y + 2z=72x + 3z=14
A. {(- 
+ 7, 
, z)}
B. {(- 
+ 7, 2z, z)}
C. {(- 
- 7, 2z, z)}
D. {(- 
- 7, 
, z)}
Solve the problem.As part of a physics experiment, Ming drops a baseball from the top of a 315-foot building. To the nearest tenth of a second, for how many seconds will the baseball fall? (Hint: Use the formula h = 16t2, which gives the distance h, in feet, that a free-falling object travels in t seconds.)
A. 1.1 sec B. 4.4 sec C. 19.7 sec D. 78.8 sec
A certain small country has $20 billion in paper currency in circulation, and each day $70 million comes into the country's banks. The government decides to introduce new currency by having the banks replace old bills with new ones whenever old currency comes into the banks. Let x = x(t) denote the amount of new currency in circulation at time t with x(0) = 0. Formulate and solve a mathematical model in the form of an initial-value problem that represents the ”flow” of the new currency into circulation (in billions per day).
What will be an ideal response?