The summation of "3i” from the lower limit of i equal 1 to upper limit of 3 is? 124
18
210
30

Easy points boii. read it. ya. fresh

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Plz hurry evaluate the expression a+b where a=8 and b=19