Find the value of given expression

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The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.

The relative growth rate for a certain type of fungi is 60% per hour.a small culture has formed and in just 6 hours the count shows to be 20,273 fungi in the culture.what is the initial number of fungi in the culture?

35 ! insert < , > , or = to make the sentence true. 12 __ 25 > =