Respuesta :

Answer:

5.64 x 10 ^5            4.21 x 10 ^-1

Step-by-step explanation:

564000 in standard form is

5.64 x 10 ^5

0.421 in standard form​ is

4.21 x 10 ^-1

To convert a number into standard form, split the number into two parts - a number between 1 and 10 multiplied by a power of 10.

Therefore,

A) 5.64 × 10^5

B) 4.21 × 10-1

Hope this helped! -ariana