How do i solve this word problem (based on real numbers)

cant figure out the operations to use

in january 2008, the temperature in parts of minnesota fell from 48ºf to -12ºf over a 24 hour period. what was the average temperature change per hour

a. (1 1/2)

1/2)

c. -2.5ºf

d. 2.5ºf

Find the surface area of the prism formed by the net

Which of the following lines does not intersect the line y=-2x+3 ? a) y=2x b) y=2x-3 c) y=2x+3 d) y=-2x-3

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct