10 watermelon coat $15.what is the cost of one watermelon?

$1.50

Step-by-step explanation:

To get the answer, simply divide the cost of 10 watermelon by the total number of watermelon, to get the cost of one watermelon.

So:

$15/10=1.50

one watermelon costs $1.50

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.