Using the properties of integer exponents, match each expression with the correct equivalent expression?

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

Ineed me i stuck and i don’t want to get it wrong

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.