Answer:
Step-by-step explanation:
Exact form: 23/20
Decimal form: 1.15
The common denominator is 40.
We must find the common ratio first...
Since a(n)=ar^(n-1)
-3359232=12r^7
-279936=r^7
-279936^(1/7)=r
-6=r
So our geometric sequence is:
a(n)=12(-6)^(n-1)
And the sum of a geometric sequence is:
s(n)=a(1-r^n)/(1-r), since a=12, r=-6, and n=8 we have:
s(8)=12(1-(-6)^8)/(1--6)
s(8)=12(1-(-6)^8)/7
s(8)= -2,879,340
First, you find what 25% of $450.To do that, make 25% into a decimal, which is 0.25.Then you multiply 450 times 0.25 which is 112.5
Second, you find what 5% of 450. 5% as a decimal is 0.05. Then you multiply 450 times 0.05 which is 22.5
Third, you add 450+112.5+22.5 which is 585.
There you go. :) Hope that helped!
