Rewrite in the simplest rational exponent form: √y⋅7√y y^a/b

Can someone pls ! pls answer all. no explanation needed..

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)

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?