Ramesh buys a pen for Rs 20 and sells it at 20% profit. For what price should he buy it so that he can make 25% profit by selling for the same selling price,
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Find the average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Choose the more precise measurement. 26.4 cm or 8.39 cm