Answer:
Option B. $0.70
Step-by-step explanation:
First day fine = $0.10
Second day fine (doubled or $0.30 which is lesser)
= $0.10 + $0.10 [$0.10 is lesser than $0.30]
= $0.20
Third day fine = $0.20 + $0.20 [ $0.20 is lesser than $0.30]
= $0.40
Fourth day fine = $0.40 + $0.30 = $0.70
[$0.30 is cheaper than doubling the amount $0.40 + $0.40]
Therefore, the total fine for a book on the fourth day is $0.70
6^(8x) = 4
log 6^(8x) = log 4
8x log 6 = log 4
x = log 4 / 8log 6 = 0.10 to two decimal places.
That is the vertex
since the leading coefient (the term in front of the the x^2 term)
get into form
y=a(x-h)^2+k
te vertex is (h,k)
max value is k which occurs at x=h
complete the square
h(t)=(2x^2+4x)+7
h(t)=2(x^2+2x)+7
h(t)=2(x^2+2x+1-1)+7
h(t)=2((x+1)^2-1)+7
h(t)=2(x+1)^2-2+7
h(t)=2(x+1)^2+5
vertex is at (-1,5)
the max value is 5