3. Use the formula to evaluate the series 1 - 2 + 4 - 8+ ... - 10. Sn
a1(1-7)
1-r
In the formula for a finite series, a, is the first term, r is the common ratio, and n is the number of terms.
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1023
-1023

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.