Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, the way you wrote the number is the standard form for your example.
43,000,000 * * * * * No. The standard form is 4.3*107
It is: 4.3*101
43,000,000,000
43.962
43.0962
43.962
43
43
4^3 or 43 ( = 64 )
4.643*10-1 inches.
43.0962 = 40 + 3 + 0.09 + 0.006 + 0.0002
64 * * * * * 43