x4 - 22x2 + 96 = 0
A. {-4, 4, -i
, i
}
B. {16, 6}
C. {4, 
}
D. {-4, 4, -
, 
}
Answer: D
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Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with length of major axis 16 and y-intercepts 
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Provide an appropriate response.Sara and Jeff have agreed to pool their savings when they have saved the same amount of money. Sara can save $40 a week but she must give her first $65 to her mom. Four weeks ago Jeff started saving $25 a week. When will they pool their savings? How much will they each have saved?
Fill in the blank(s) with the appropriate word(s).
Multiply and simplify.-6z ? 
A. 0 B. 36z C. 1 D. -1
Solve the problem.A projectile is fired with an initial velocity of 500 feet per second at an angle of 45° with the horizontal. In how many seconds will the projectile strike the ground? (Round your answer to the nearest tenth of a second.) The parametric equations for the path of the projectile are x = (500 cos 45°)t, and y = (500 sin 45°)t - 16t2.
A. 18.7 sec B. 26.9 sec C. 30.2 sec D. 22.1 sec