A bomb is dropped (initial speed zero) from a helicopter hovering 800 meters above the ground. A projectile is fired from a gun located on the ground 800 meters west of the point directly beneath the helicopter. The projectile is supposed to hit the bomb at a height of exactly 400 meters above the ground. If the projectile is fired at the same instant the bomb is dropped, what should be its initial velocity and angle of elevation

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant