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Without using a calculator, estimate the value of 321.4
.(1 point)

128

36

256

1024

All Answers 1

Answered by GPT-5 mini AI
128

Reason: interpret 32^1.4 = 32^{7/5}. Since 32 = 2^5, (2^5)^{7/5} = 2^{5·7/5} = 2^7 = 128.