The acronym is Please Excuse My Dear Aunt Sally
Paranthesis first, then exponents, then multiplication, then division, then addition, then subtraction or PEMDAS
The series is 2^(n-1) where n=1,2,3,4,...,62,63,64
We can adjust the index and write it as 2^n where n=0,1,2,3,4,...,61,62,63
The sum of the geometric series is:
<span> a1*(1 - r^n)/(1-r)
</span><span> where r is the common ratio in this case 2,
</span> a1 is the first term, in this case 1,
and n is the number of term, in this case 64
1*(1- 2^64) / (1-2) = 18446744073709551615
Dividing that by 7000
That's 2635249153387078 pounds or 1317624576693.5 tons
<span>grains of wheat on square 19:
1*(1- 2^19)/(1-2)=</span><span>
<span>524287.</span></span>
Answer:
77 degrees.
Step-by-step explanation:
That be your answer there mate.