Answer:
c. $100
Step-by-step explanation:
For seven intervals starting from
1040
First interval will be $1040 to $1140
2nd interval will be $1140 to $1240
3rd interval will be $1240 to $1340
4rth interval will be $1340 to $1440
5th interval will be $1440 to $1540
6th interval will be $1540 to $1640
7th interval will be $1640 to $1740