Simplify and express the result in power notation with positive exponent (3^-7 ÷ 3^-9) × 3^-4

Plz hurry.

Need full workings!!​

Is a currency whose value is tied to another currency, meaning that the exchange is fixed

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?