Solve the problem.The gravitational attraction A between two masses varies inversely as the square of the distance between them. The force of attraction is 2.25 lb when the masses are 4 ft apart, what is the attraction when the masses are 6 ft apart?
A. 1 lb
B. 4 lb
C. 3 lb
D. 2 lb
Answer: A
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Answer the question.There is an identity property for both addition and multiplication. Is there an identity property for subtraction? If so, state the property.
A. Yes. x - 0 = x B. No.
Find the annual amount of depreciation using the units-of-production method. Round to the nearest dollar.Depreciation per unit: $0.03Units of production: 130,000
A. $390 B. $433,333 C. $43,333 D. $3900
Solve the problem.S(x) = -x3 - 9x2 + 165x + 1300, 5 ? x ? 20 is an approximation to the number of salmon swimming upstream to spawn, where x represents the water temperature in degrees Celsius. Find the temperature that produces the maximum number of salmon.
A. 5°C B. 19°C C. 6°C D. 20°C
Find the derivative.y = (x-2 + x)-3
A. 
= 
B. 
= 
C. 
= 
D. 
= 