Determine exact time needed for there to be bacteria
The number N of bacteria in the culture is modeled by function N (t)= 25e^kt, where t is measured in hours. If there are 200 bacteria after three hours, determine exact time needed for there to be 300 bacteria.
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Assume an observational study is conducted to investigate the smoking behaviors of male as well as female patients with a history of coronary heart disease. Among 220 men surveyed, 80 were smokers. Among 190 women surveyed, 95 were smokers.
The reflecting telescope has the mirror shaped like the paraboloid of revolution. If distance of vertex to focus is 31 feet and distance across top of mirror is 54 inches, how deep is mirror in center?
Light of 650 nm is incident on the two slits. A maximum is seen at an angle of 3.39° and a minimum of 3.95°. Determine the order m of the maximum?
Determine how broad are the first two bright fringes on either side of the central bright fringe? (State the width of the bright fringe as the linear distance from minimum to minimum.)
The two second order bright fringes on a screen 1.5 meters away and are 2.2 m apart. Determine the wavelength and frequency of the light
The two similar speakers in an auditorium are positioned 10.0m apart above the phase. The amplifier system introduces a 690 Hz buzzing noise to the sound, which annoys some audience members. Employ v = 343 m/s as the speed of sound in air. i) Dete
The magnetic field of earth at the magnetic north pole is directed vertically downward and has a magnitude of 0.62 G. The earth's field is about that of a current loop situated at the center of the earth. (i) Determine the magnitude and direction
How many subjects would be needed to determine the true proportion who spend more than $500 on prescription medications per year with margin of error no more than 2%, with 95% confidence?
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