Four cubes of ice, each with an edge length of 4 cm are left to melt in an empty cylindeical glass with a radius of 6 cm. What is the height of the water in the glass once all four cubes have melted completely?

~ 2.263 cm

Step-by-step explanation:

Each cube has a volume of 4*4*4 = 64 cc

Vol = 4 times that = 256 cc

Vol of the cylinder = pi times times h=256

256=pi times times h

h=256 divided by 36 times pi

h=64/(9pi)

h= ~ 2.263 cm

so, converting firstly the mixed fractions to improper fractions and then "adding".

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9