A submarine periscope has a viewing distance of d = 1.5i, where h is the height in feet above the water and d is the viewing measured in miles. To the nearest foot, how many feet above the .- water would the periscope have to be to see a ship 6 miles away?

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

In the figure below, m∠r is 60°, and m∠t is 120°. what is m∠q? a. 60° b. 30° c. 120° d. 54

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.