Answer:
(0.755, 0.845)
Step-by-step explanation:
I got it right, on the test so trust me!
The mistake is line 4, she should have divided 42 by 5, not add 5 and 16
GP = 1/2 , 1/4 , 1/8 , 1/16
1st) the common ratio is (1/4 : 1/2 ) = 1/2, so r =1/2
2nd) the sum of a GP is:
S= a(1-rⁿ)/(1-r)
S=(1/2).[1-(1/2)⁴]/(1-1/2) = 15/16
The first one is the answers
