Answer:
4 over 3
Step-by-step explanation:
First off, they give you the answer by showing you the Xs being broken down into 3 groups of 4 (4) and the circles being broken down into 3 groups of 3 (3).
We can use elimination since the Xs are the larger and circles are smaller. So using this, 3 over 4 cant be and neither can 9 over 12.
9 over 4 cant work either because going up by 9s and 4s cant get to 12 over 9.
Answer:
I can't find the answer for the last one, but here it is
Step-by-step explanation:
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>