Briefly describe scientific notation. How is it useful for writing large and small numbers? How is it useful for making approximations

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

Which fraction is equal to 1hole and 2/5? a.3/5 b.75 c.57 d.73

In δabc, m∠acb = 90°, cd ⊥ ab and m∠acd = 45°. find: a find cd, if bc = 3 in