What is 4,210,000,000 written in scientific notation? A 421 x 10 to the 9th power

B 42.1 x 10 to the 8th power

C 4.21 x 10 to the 9th power

D 4.21 x 10 to the 10th power

hii there

the correct answer is option ( B ) 4.21*10th power 9

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4.21*10 to the 9th power

Step-by-step explanation:

4 is the first whole number; Place an decimal point just after and include the whole numbers afterward as the decimal; 4.21. Then count everything beyond the first whole number and you get 9 (including zeros) .

Therefore, 4.21 * 10 to the 9th power