Mara writes 120,000 in scientific notation and gets 1.2 × 10^5.
Which of the following is a true statement?
a) She is incorrect because the exponent should be 6.
b) She is incorrect because the exponent should be negative.
c) She is incorrect because 1.2 should be 0.12.
d) She is correct.

Question

Mara writes 120,000 in scientific notation and gets 1.2 × 10^5.
Which of the following is a true statement?
a) She is incorrect because the exponent should be 6.
b) She is incorrect because the exponent should be negative.
c) She is incorrect because 1.2 should be 0.12.
d) She is correct.

anonymous · Answer

C, 1.2 x 10^5 is 1,200,000. moving the decimal place over one place will be the correct answer.

anonymous · Answer

Well did u tried to convert 120,000 into scientific notation

anonymous · Answer

@stnguyen  C is not the answer

anonymous · Answer

1.2*10^5=120,000

anonymous · Answer

Sorry, my mistake. Please disregard my answer.

anonymous · Answer

AND in scientific notation decimal must be always after one non-zero digit.

anonymous · Answer

@OneKoi  now, can u tell me which one is the answer?

kirbykirby · Answer

d) Just count the number of "places" after the decimal point. If you have 120,000 and you put 1.2 x 10^(?) then you count the number of positions after the decimal: so 2,0,0,0,0 = 5 digits. so 1.2x10^5