Question

Write the sum of (4 × 10³) + (3.2 × 10¹) in scientific notation.

A) 43.2 x 104
B 4.32 x 105
C) 43.2 x 105
D) 7.2 x 10¹

Answer 1

`\huge\text{Hey there!}`

`\mathsf{(4*10^3) + (3.2* 10^1)}`

`\mathsf{= 4*10^3 + 3.2* 10^1}`

`\mathsf{= 4*10*10*10 + 3.2*10}`

`\mathsf{= 4*100*10 + 3.2*10}`

`\mathsf{= 4*1,000 + 3.2*10}`

`\mathsf{= 4,000 + 32}`

`\mathsf{= 4,032}`

`\mathsf{\approx 4.032*10^3}`

`\huge\text{Thus, your answer SHOULD be: \boxed{\mathsf{4.032*10^3}}}\huge\checkmark`

~
`\frak{Amphitrite1040:)}`