Joannie lent $200 to her sister. Four years later, her sister repaid her in full with $228. What simple annual interest rate did Joannie's sister pay? A 3.0
B. 3.5
C.4.0
D.4.5

pls hurry im timed

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?