Elena's Hair Salon uses an average of 5.4 quarts of shampoo per month. If 10 points Elena wants to order enough for the entire year how many quarts of
shampoo does she need to order?
A) 60
B) 5.4
C) 64.8
D) 59.4

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.

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."