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Can someone answer it, and plot it, for 20 points and brainliest answer? p. s. they're the same ! : )

Nine more than four times a number is the same as one less than twice the number. find the number?

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3