5/8 cant be simplified more. Or you set the problem up wrong.
Step-by-step explanation:
The volume of a hemisphere is given by :
Taking differentiation,
So,
Put r = 21 m and dr = 0.03 cm = 0.0003 m
Hence, this is the required solution.
The answer is 72 because 604-72=532 and 532+72=604
Absolute value (|2|) makes all the numbers in it positive.
|5-9|= -4 with absolute value -> 4
|5|-9: only 5 is in the absolute value:
|5|-9 -> 5-9=-4
number 1: 4
number 2: -4