Translate the sentence into a mathematical equation. Be sure to identify the meaning of all symbols.The force of gravity between two objects is the gravitational constant times the product of their masses divided by the square of the distance between them.
A. If F is the force of gravity, G the gravitational constant, m1 the mass of one object, m2 the mass of the second, and d the distance between them, then 
B. If F is the force of gravity, G the gravitational constant, m1 the mass of one object, m2 the mass of the second, and d the distance between them, then 
C. If F is the force of gravity, G the gravitational constant, m1 the mass of one object, m2 the mass of the second, and d the distance between them, then 
D. If F is the force of gravity, G the gravitational constant, m1 the mass of one object, m2 the mass of the second, and d the distance between them, then 
Answer: A
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Multiply and reduce to lowest terms.
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A. 
B. 
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Solve the problem.The current I in an electrical conductor varies inversely as the resistance R of the conductor. The current is 2 amperes when the resistance is 355 ohms. What is the current when the resistance is 570 ohms?
A. 3.2 amp B. 0.8 amp C. 0.31 amp D. 1.2 amp
Solve the system by graphing.4x + y = -13 x + 4y = 8
A. (4, 3) B. (-4, 3) C. (-3, -1) D. (-4, -5)
Solve the problem.The rates of death (in number of deaths per 100,000 population) for 1-4 year olds in a certain country between 1995-2010 are given below. 
A logarithmic equation that models this data is y = 822.99 - 167.55 ln x where x represents the number of years since 1915. Use this equation to predict the rate of death for 1-4 year olds in 2020. Round to the nearest tenth.
A. 50.3 deaths per 100,000 B. 45.7 deaths per 100,000 C. 43.2 deaths per 100,000 D. 39.2 deaths per 100,000