Find the standard form of the equation of the parabola.Focus at (-2, 0), directrix x = 2
A. -8y = x2
B. x = - 
y2
C. y = - 
x2
D. y2 = -8x
Answer: B
You might also like to view...
Solve the problem.The table shows the number of deaths due to car accidents in a certain city in various years. 
Let f(t) be the number of deaths due to car accidents at t years since 2012. Find a quadratic equation for f in vertex form. Use the data for the year 2015 to find the vertex and use the data for the year 2017 to find the value of a.
A. f(t) = -1.24(t - 3)2 + 219 B. f(t) = -7.75(t - 3)2 + 270 C. f(t) = -1.24(t - 3)2 + 270 D. f(t) = -7.75(t - 3)2 + 219
Find the value of the expression.log10 10
A. 10 B. 0 C. 1 D. -1
Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.6, 14, 22, 30, 38, . . .
A. an = 8n - 2; a20 = 158 B. an = 2n - 1; a20 = 39 C. an = 8n - 1; a20 = 159 D. an = 2n - 8; a20 = 32
The weight of items produced by a machine is normally distributed with a mean of 8 ounces and a standard deviation of 2 ounces. Refer to Exhibit 6-5. What is the probability that a randomly selected item weighs exactly 8 ounces?
a. None of the alternative answers is correct. b. 0.5 c. 0.3413 d. 1.0