Question

I'ma need someone to help me

Answer 1

Answer for number 1

Scientific: 3×
`10^(2)`

Standard: 300

Steps:

Reduce the fraction with 3.

3×
`10^(9)` /
`10^(7)`

Simply the expression.

3×
`10^(2)`

Evalulate the power & Multiply the numbers

3×100 = 300

Answer for number 2

Scientific: 4.5×
`10^(5)`

Standard: 450000

Steps: Separate the fraction into 2 fraction.

`(9.45)/(2.1)`×
`(10^(7) )/(10^(2) )`

Divide the numbers and Divide the terms with the same bases by subtracting their exponents.

4.5×
`10^(7-2)`

Subtract the numbers and you get

4.5×
`10^(5)`

Answer for number 3

Scientific: 1.5×
`10^(-3)`

Standard: 0.0015

Steps: Separate the fraction into 2 fractions

`(7.5)/(5)`×
`(10^(-5) )/(10^(-2) )`

Divide the numbers. Divide the terms with the same base by subtracting their exponents.

1.5×
`10^(-5-(-2))`

Calculate the sum and you get 1.5×
`10^(-3)`

Hope this helps ʕ•ᴥ•ʔ