Suppose you have a 4x4 checkerboard with 16 squares. You put one penny on the first square, then 2 pennies on the next square then 2 to the second power pennies on the third square and so on until there are pennies on all the squares. How many pennies are on the 15th square?

answer is 33

step-by-step explanation:

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870

yes

step-by-step explanation:

they have to be opposite and reciprocal of eachother.