Respuesta :

Answer:

18>-30

Step-by-step explanation:

Answer:

9) 18 > -30

10) true

Step-by-step explanation:

negatives are smaller than positive numbers,the greater a negative number is the smaller the value is

( example:

-19 is less than -18)

below sea level means negative.

so, 50 below sea level means -50 ,which is less than -40.