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What is the slope of a line that is perpendicular to y = 3x + 1

What is the value of x? assume that the line is tangent to the circle.

Aplane is flying at 32,500 feet. it needs to rise to 36,000 feet in two stages.• in stage 1, it rises 5% of its initial altitude of 32,500 feet.• in stage 2, it rises at a rate of 125 feet per minute.how many minutes does it take for the plane to rise during stage 2?