A check board contains 64 squares. If two are placed on the first square, four pennies on the seconds square, eight pennies on the third square, sixteen pennies on he fourth square, and so on the number of pennies on the ninth square can be found by the model T=2n find the number of pennies on the 35th square what is this amount in dollars?

the answer is ! ?

96 39 cause 135 -96=39 im smart (i used a calculater)

i need more details

step-by-step explanation:

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."