An old man had a bag of rice on the first day, each day afterwards he would get triple of what he got before, but every 5 days he would receive no bags of rice. How many bags of rice would the old man have after 45 days?

Question

abb0t · Answer

89?

shamil98 · Answer

no -_-

shamil98 · Answer

S = (first term)(1-r^n)/(1-r)
is your formula, but you must remember 9 of those days he did not receive any rice.

anonymous · Answer

brb as I go look at wios post

shamil98 · Answer

Lol batman xD

anonymous · Answer

:P

anonymous · Answer

more rice than we can fit in the USA

shamil98 · Answer

LOL you shouldve seen wio's question lmao

shamil98 · Answer

like 18 quintillion pounds of rice or something

anonymous · Answer

so put * 4/5 in there somewhere

anonymous · Answer

you ever verify the 6*12 piece of paper origami crease project?

shamil98 · Answer

I haven't.

anonymous · Answer

|dw:1381703107566:dw|

anonymous · Answer

3^(666)+1=the answer, 
i couldn't calculate it cuz it shows overflow for the calculator

shamil98 · Answer

@wio

anonymous · Answer

The accumulative amount, or just the amount received on day 45?

anonymous · Answer

We have $$
a_n = a_1r^{n-1}=1\times 3^{n-1}=3^{n-1}
$$

anonymous · Answer

Where $d$ is the number of days, we can calculate $n$ to be: $$
n=d-\left\lfloor \frac d5 \right\rfloor 
$$

anonymous · Answer

so if $d=45$ then $$
n=45-\left\lfloor \frac {45}5 \right\rfloor=45-\left\lfloor 9 \right\rfloor=36
$$

shamil98 · Answer

The sum,

shamil98 · Answer

My bad I should've put that in the question

anonymous · Answer

So the number of bags received on that day is: $$
a_{36}=3^{36-1}=50031545098999707\approx 5.00\times 10^{16}
$$The accumulated bags would be: $$
S_n = a\frac{1-r^n}{1-r}=(1)\frac{1-(3)^{36}}{1-(3)}=75047317648499560\approx 7.50\times 10^{16}
$$

shamil98 · Answer

WIO YOU HAVE 99 SS 
CONGRATS ! :O

anonymous · Answer

part B of the question.
If each bag of rice was 20" long by 12" wide with a volume of 7 gallons, how high could you stack the bags end to end from california to new york if the distance was 3250 miles?

shamil98 · Answer

LOL

anonymous · Answer

231cubic inches per gallon

shamil98 · Answer

63360 inches in a mile..

shamil98 · Answer

if you stacked the bags it would go beyond the earth and into space

shamil98 · Answer

space begins at 62 miles of altitude o.o

anonymous · Answer

bag height = 6.7375" thick, (on an engineers drafting board, we wont count sag)

anonymous · Answer

consider: we dont know how much rice is in each of those 5.00×10^16 bags, but the number of bags is = to about 1/2 the # of  atoms in the universe