Arianna deposits $500 in an account that pays 1.3% interest, compounded semi-annually. How much is in the account at the end of 2 years?

1•3 × $500

100

1.3 × 10 × $500

100× 10

13 × $500

1000

=$6.5 semi annually

end of two years

6.5 × 4

=$26

in account

$500+$26

=$526

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490