Question

pls answer those correctly​

Answer 1

Answer:

$9. (\frac{2}{3})^{4}×(\frac{2}{3})^{-6} ×(\frac{2}{3})^{2}\\=(\frac{2}{3})^{4-6+2}\\=(\frac{2}{3})^{0} [a^{0}=1] \\=1 (b)$

$10. 5^{3}÷125\\=\frac{5^{3} }{125}\\=\frac{125}{125} \\=1 (a)$

$11. (\frac{1}{2})^{-2} +(\frac{1}{3})^{-2} +(\frac{1}{4})^{-2}\\=(2^{-1}) ^{-2}+(3^{-1})^{-2}+(4^{-1})^{-2}\\=2^{2}+3^{2}+[(2^{2})^{-1}]^{-2}\\=4+9+(2^{-2})^{-2}\\=4+9+2^{4}\\=13+16=29$

$12. (2^{0} +3^{0})÷4^{0} \\=\frac{(2^{0} +3^{0} )}{4^{0} }\\=\frac{1+1}{1}\\=2$

13. standard from of 69825 =6.9825×10^{4}

14. standard from of 0.00006= 6×10^{-5}

15. 3.65×10^{4}= 36500

Step-by-step explanation:

crop the last questions and ask again.

Hope it helpful.