Sharon is running in a relay race. She is initially running at 5.2 m/s when she grabs the baton, and then she speeds up until she reaches the finish line 0.5 min later. Sharon's average speed was 4.9 m/s . What was Sharon's speed as she crossed the finish line?

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

if you answer my question i will answer yours

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form