Someone please help:(! I’m taking a 300 question quiz for my act prep course. ASAP.

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.