SOLUTION: EARTH SCIENCE In 1970, Russian geologists began drilling a very deep borehole in the Kola Peninsula. Their goal was to reach a depth of 15 kilometers, but high temperatures in th

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Question 932951: EARTH SCIENCE In 1970, Russian geologists began drilling a
very deep borehole in the Kola Peninsula. Their goal was to reach a
depth of 15 kilometers, but high temperatures in the borehole
forced them to stop in 1994 after reaching a depth of 12 kilometers.
They found that the approximate temperature x kilometers below
the surface of the Earth is given by
T = 30 + 25(X – 3) 3 ≤X ≤12
where T is temperature in degrees Celsius. At what depth is the tem-
perature between 150° and 250°c, inclusive?

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

temperature between 150° and 250°c, inclusive
150%3C=+30+%2B+25%28X+-3%29%3C=250+
150%3C=+30+%2B+25X+-75%3C=250+
150%3C=++25X+-45%3C=250+
150%2B45%3C=++25X+-45%2B45%3C=250+%2B45
195%3C=++25X+%3C=295+
195%2F25%3C=++25X%2F25+%3C=295%2F25+
7.8%3C=++X+%3C=11.8+