<u>Answer-</u>

<u>Solution-</u>
As we know that, on the number line, if a number is on the right of another number, then the former number is greater than the later number.
As, the number on the right side are 4, 5, ...so on (4 is dotted so it is included)
So the inequality will be 
As, the number on the left side are -3, -4, -5, ..... so on (-2 is not dotted so it is excluded)
So the inequality will be 
Then the compound inequality will be, 
Answer: 390 calls
Step-by-step explanation:
13/2= 6.5
6.5 x 60 min= 390
the no must be 858 o 868 or 878 or 888 or 898
8+5+8=21
8+6+8=22
8+7+8=23
8+8+8=24
8+9+8=25
now 898 is the most likely case here
lets go deep into it
approximating 898 to nearest hundred gives 900
addition of each character of 898 gives 25
reading forward and backward both 898 remains same
therefore 898 is the number which satisfies the given conditions. therefore the answer is 898