Summer (starting from rest) runs from the 20 m mark to the 35 m mark with an acceleration of .5 m/s2. What is her final velocity? A. 12 m/s
B. 7.5 m/s
C. 15 m/s
D. 20 m/s

the square root of what number? if you add that, then someone will probably answer the question.

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.

answer:

it is 28 degrees colder in detroit than philadelphia.

step-by-step explanation:

what number adds to 21  

-7 + ? = 21

-7 + 28 = 21

hope it