this illustration shows the east pacific rise, which grows at an approximate rate of 15 cm/year. approximately how much will the east pacific rise have grown in five years?
a) 60 cm
b) 75 cm
c) 90 cm
d) 110 cm

 [B]:    " 75 cm " .

Explanation:

(15 cm)             5 yr            

     *          =    ?

     yr                    1  

The units of "yr" (years) ;  cancel out to "1" ;

 since any value, divided by that same value, is equal to "1" ;

 as such;   " yr / yr  = 1 " ;

→   And we have:

15 cm            5

  *    ___    =      15 cm * 5  = 75 cm ;  which is:

  1                  1                Answer choice:  [B]:  " 75 cm " .

Hope this is helpful to you!

  Best wishes!

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form