Derive the equation of the parabola with a focus at (2, −1) and a directrix of y = −1/2. A. f(x) = −(x + 2)2 − 3/4
B. f(x) = (x + 2)2 + 3/4
C. f(x) = −(x − 2)2 + 3/4
D. f(x) = −(x − 2)2 − 3/4

Complete the truth table a. t, f, f, t b. t f f f c. f t f t d f t f t

Aiden buys two bags of chips at $1.09 each and a 20 ounce soda for $1.20 at the gas station.he knows that the state tax is 5.5. how much change will he receive from a $5 bill?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)