The simplified answer is 17. Should I show you the steps?
Answer:
11
Step-by-step explanation:
x-5 = 6
It would take greater than 31.25 hours for Tim's price to be better. So in terms of whole hours it would take at least 32 hours of work for Tim's price to be better.
5 - 8 would be a negative answer
think of it as a bank account if you $5 in the account and you take away $8, how much would you have after? $-3 so your answer would be -3
and same with -5-(-3)
this would be -2
This is just a geometric sequence with a sum of:
s(n)=a(1-r^n)/(1-r), a=initial term, r=common ration, n=term number
The rate here is 40% which is 0.4 and a=75 meters so
s(n)=75(1-0.4^n)/(1-0.4)
Notice how when n approaches infinity the number becomes just a(1-0), which gives you:
s(n)=75/(1-0.4)
This is a general solution whenever the rate squared is less than 1, the sum of the infinite series will always be:
s(n)=a/(1-r)
So in this case we have:
s(n)=75(1-0.4)
s(n)=75/0.6
s(n)=125 meters.