Answer:
b=24
Step-by-step explanation:
you use a^2+b^2=c^2
so 10^2+b^2=26^2
100+b^2=676
subtract 100 from both sides
b^2=576
then sq rt the 576 to get 24
c is the correct answer to your problem
I think the answer is 40. it will take about 20 months to have 100 dollars