Mostly when youre thinking of it, it's present tense while also being future tense as well, could, meaning in the present. For example, "I could do that". More than likely your sentence is in the present
First one is C! Because it explains what’s wrong with the lack of fast food in not populated areas. Second one is B! Because they cannot afford much therefore it’ll have a bad outcome. The last one I was a little confused on but It’s likely A.
About 73 years. You would use the compound interest formula.
1290=430 ( 1 + 1.5/100) ^ t
t = 73.788 years
