Find an equation for the ellipse described.Center at (0, 0); focus at (-2, 0); vertex at (5, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: C
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Factor the polynomial. If the polynomial is prime, so state.x2 - x - 45
A. (x - 45)(x + 1) B. (x - 5)2 C. (x + 5)(x - 9) D. prime
Solve the problem.The capsize screening value C is an indicator of a sailboat's suitability for extended offshore sailing. C is determined by the function C = 4D-1/3B, where D is the displacement of the boat in pounds and B is its beam (or width) in feet. The International Offshore Rules require that the capsize screening value be less than or equal to 2 for safety. What is the maximum allowable beam (to the nearest inch) for a boat with a displacement of 
A. 13 ft 8 in. B. 71 ft 3 in. C. 27 ft 3 in. D. 6 ft 10 in.
Match the equation with its graph.y = 2x + 2
A. 
B. 
C. 
D. 
Solve the problem.The energy cost of a speed burst as a function of the body weight of a dolphin is given by 
where w is the weight of the dolphin (in kg) and E is the energy expenditure (in kcal/kg/km). Suppose that the weight of a 
dolphin is increasing at a rate of 5 kg/day. Find the rate at which the energy expenditure is changing with respect to time.
A. -2.9951 kcal/kg/km/day B. -11.7541 kcal/kg/km/day C. -0.0012 kcal/kg/km/day D. -0.006 kcal/kg/km/day