Ten blocks were placed in a line at 10 cm intervals. Ten pennies
were placed between the first
two blocks, 20 pennies were
placed between the next two
blocks, then 30 pennies, then
40 pennies, and so on. How
much money was used to fill the
spaces?

nswer: a   y-axis

step-by-step explanation:

600,000,000,000, or 6e14

step-by-step explanation:

i saw this question before, dont know the asnwer srry

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."