Determine if the graph is symmetric about the x-axis, the y-axis, or the origin. r = -2 + 3 cos θ (5 points)
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A railroad tunnel is shaped like a semiellipse, as shown bel…
A railroad tunnel is shaped like a semiellipse, as shown below. The height of the tunnel at the center is 54 ft, and the vertical clearance must be 18 ft at a point 8 ft from the center. Find an equation for the ellipse. (5 points)
(05.05 LC) A random sample has been taken from a population…
(05.05 LC) A random sample has been taken from a population. A statistician, using this sample, needs to decide whether to construct a 95% confidence interval for the population mean or a 99% confidence interval for the population mean. How will these intervals differ? (4 points)
Find the standard form of the equation of the parabola with…
Find the standard form of the equation of the parabola with a focus at (0, -10) and a directrix at y = 10. (5 points)
Will bacteria living in hot springs have more saturated or u…
Will bacteria living in hot springs have more saturated or unsaturated fatty acids? Give reason for your answer.
(05.01 LC) A study of pet owners included 752 owners who we…
(05.01 LC) A study of pet owners included 752 owners who were chosen at random. Of these pet owners, 63% said they had spayed or neutered their pets. Vet records show that only 39% of pet owners spay or neuter their pets. Identify the statistic and the parameter. (4 points)
Find the rectangular coordinates of the point with the polar…
Find the rectangular coordinates of the point with the polar coordinates. (5 points)
(05.04 MC) A zoning board in Pine County is interested in e…
(05.04 MC) A zoning board in Pine County is interested in estimating the proportion of its residents in favor of larger school zones in that county. A random sample of Pine County residents was selected. All the selected residents were asked, “Are you in favor of larger school zones in your county?” A 95% confidence interval for the proportion of residents in favor of larger school zones in that county was calculated to be 0.48 ± 0.02. Which of the following statements is correct? (4 points)
What type of microscopy provides a three-dimensional view of…
What type of microscopy provides a three-dimensional view of the surface of an object?
(05.01 LC) A study of fishermen included 812 anglers who we…
(05.01 LC) A study of fishermen included 812 anglers who were chosen at random. Of these anglers, 59% said they use live bait. Bait shop owners show that only 41% of anglers use live bait. Identify the statistic and the parameter. (4 points)