Question

Can you please help me on 9 and 10?

Answer 1

Question 9 : B
Question 10 : C

Answer 2

Q9. C.

Q10. B.

Explanation:

`\bold{Q9.}\\\\(3)/(14)=3:14\approx0.214=0.214\cdot100\%=21.4\%\\\\\bold{A.\ NOT}\ 7\%<21.4\%\\\bold{B.\ NOT}\ 10\%<21.4\%\\\bold{D.\ NOT}\ 20\%<21.4\%\\\\\bold{C.\ YES}\\\\(4)/(15)=4:15=0.2\overline{6}>0.214\\\\6*10^(-1)=6*(1)/(10)=6*0.1=0.6>0.214\\\\(11)/(50)=11:50=0.22>0.214`

`\bold{Q10.}\\\\\text{The scientific notation:}\ a*10^k,\ \text{where}\ 1\leq a<10,\ \text{and}\ k\in\mathbb{Z}.\\\\0.000038=0.\underbrace{00003}_(5\to)8=3.8*10^(-5)\\\\0.000038=3.8*0.00001=3.8*0.1^5=3.8*10^(-5)`