Factor the difference of two squares.16x2 - 49
A. (4x - 7)2
B. (4x + 7)(4x - 7)
C. (4x + 7)2
D. prime
Answer: B
Mathematics
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Find the rectangular equation of the given polar equation.r sin ? = 10
A. x = 10 B. y = 10x C. x = 10y D. y = 10
Mathematics
Provide an appropriate response.Find ? if cos ? = 0.6896 rounded to the nearest tenth of a degree.
A. 0.8° B. 42.6° C. 34.6° D. 46.4°
Mathematics
Find an equation for the ellipse described. Graph the equation.Foci at (-4, -1) and (2, -1); length of major axis is 10
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Solve the problem.Suppose the cost per ton, y, to build an oil platform of x thousand tons is approximated by 
What is the cost per ton for x = 50? Round your answer to the nearest hundredth, if necessary.
A. $462.96 B. $10.00 C. $5625.00 D. $6250.00
Mathematics