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5.01 *10^-7-30*10^-9

User Folyd
by
8.3k points

2 Answers

6 votes

Answer:

4.71 x 10^-7

Explanation:

User Ryan Griffith
by
7.9k points
5 votes

Answer:


\large\boxed{4.71*10^(-7)}

Explanation:


5.01*10^(-7)-30*10^(-9)\qquad\text{use}\ a^n\cdot a^m=a^(n+m)\\\\=5.01*10^(-9+2)-30*10^(-9)\\\\=5.01*10^(-9)\cdot10^2-30*10^(-9)\\\\=(5.01\cdot10^2)*10^(-9)-30*10^(-9)\\\\=(5.01\cdot100)*10^(-9)-30*10^(-9)\\\\=501*10^(-9)-30*10^(-9)\qquad\text{distribute}\\\\=(501-30)*10^(-9)\\\\=471*10^(-9)\\\\=4.71\cdot10^2*10^(-9)\qquad\text{use}\ a^n\cdot a^m=a^(n+m)\\\\=4.71*10^(2+(-9))\\\\=4.71*10^(-7)

or


5.01*10^(-7)-30*10^(-9)\\\\=5.01*10^(-7)-30*10^(-7+(-2))\\\\=5.01*10^(-7)-30*10^(-7)\cdot10^(-2)\\\\=5.01*10^(-7)-(30\cdot10^(-2))*10^(-7)\qquad\text{use}\ a^(-n)=(1)/(a^n)\\\\=5.01*10^(-7)-\left(30\cdot(1)/(10^2)\right)*10^(-7)\\\\=5.01*10^(-7)-\left(30\cdot(1)/(100)\right)*10^(-7)\\\\=5.01*10^(-7)-(30\cdot0.01)*10^(-7)\\\\=5.01*10^(-7)-0.3*10^(-7)\qquad\text{distribute}\\\\=(5.01-0.3)*10^(-7)\\\\=4.71*10^(-7)

User DzikiChrzan
by
8.3k points

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