Whats 42 hundredths as a decimal ?

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Ineed someone to me answer my question i have to have this done and knocked out