Rewrite this function in equivalent forms to identify the key features of the quadratic function it models. f(x) = 2x2 - 40 - 6
Type the correct answer in each box.
Key features:
y-intercept: 0,
axis of symmetry: z =
vertex: OD
x-intercepts: (-1,0) and ((,)

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

What is the value of x in the equation 2(x-4) = 4(2x + 1)?