Question

Need help with part A & B appriciate it

Answer 1

a) 16000000

b) 80000

Explanation:

a)

When two exponential numbers are multiplied, the exponents are added, and normal multiplication is performed between the bases, therefore

`(4.0\cdot10^{-3^{}})\cdot(4.0\cdot10^9)=4.0\cdot4.0\cdot10^(-3+9)=16.0\cdot10^6=16000000`

b)

When two numbers with different bases are divided, their exponents are subtracted, and between the bases the normal division is carried out, therefore

`(8.0\cdot10^(-5))/(1.0\cdot10^(-9))=(8.0)/(1.0)\cdot10^(-5-(-9))=8.0\cdot10^(-5+9)=8.0\cdot10^4=80000`