An assistant in a dental office just found 9 liters of 3% fluoride solution. The lab also routinely stocks a large quantity of 13% fluoride solution. How much of the 13% solution should be mixed with the 9 liters of 3% fluoride solution to make a 4% fluoride solution? Write your answer as a whole number or as a decimal rounded to the nearest tenth. liters Submit Work it out Not feeling ready yet? These can help: percent word problems nates please explain

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)