Solve for a. 3^{a\:-1}=27^{a\:-\:1}

Ineed if you could explain and give me the answer you! this needs done

What is another way to express 36 +32

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?