What surface area in square meters should she cover

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Q1. An airplane flies 200 km due west from city A to city B and then 315 km in the direction of 33.0° north of west from city B to city C.

Q2. A worker is to paint the walls of a square room 9.0 ft high and 12.0 ft along each side. What surface area in square meters should she cover?

Q3. A meteoroid is speeding through the atmosphere, travelling east at 19.3 km/s while descending at 13.5 km/s. What is its speed, in km/s?

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