Question

(4)^3/2 x (64)^5/2 x (128)^-7/2

Answer 1

0.0000152587 is your answer

Answer 2

Hey mate this will help u

${4}^{3 \div 2} \times {64}^{5 \div 2} \times {128}^{ - 7 \div 2} \\ = {4}^{1.5} \times {64}^{2.5} \times {128}^{ - 3.5} \\ = (8 )\times (32768) \times ({4.21 \times 10}^{ - 8} ) \\ = 0.0110485$

I hope u got this...