i need help on the math please?

Question

According to the Wall Street Journal, 14,200,000 videotape copies of Walt Disney's Fantasia have been sold to date. Write that number in scientific notation

A. 142 x 1,000,000
B. 1.42 x 106

C. 1.42 x 107

D. 142 x 107

Answer 1

Answer is 1.42 x 10^7
OPTION C

Answer 2

This is answer C if you fix the missing symbol. The answer is 1.42 x 10^7, since you need to move the decimal 7 places to the left to get it over to just one place in the number. Scientific Notation always uses just one place to the left of the decimal.

A fast way to find this is to count the number of digits in the original number (8), and write it with 1 digit to the left of the decimal, then the rest as the exponent after the 10 (or 7 more). Usually only 2 places are after the decimal (dropping all 0's), but some precision applications use 3 or even 4 significant digits after the decimal.

Answer 3

C, 1.42 x 10^7
There are 7 positions from the right side of the number to in between the 1 and the 4. This tells you what number to take 10 to the power of. Then you just place a decimal in between the first and second number.

Answer 4

If you mean for C: 1.42 X 10 (to the power of)7, then it's C.

Answer 5

A.
= 142 * 1,000,000
= 142,000,000

B.
= 1.42 * 106
= 150.52

C.
= 1.42 * 107
= 151.94

D.
= 142 * 107
= 15,194

Answer 6

1.42 x 10^7
so the answer is C.

Answer 7

To write a number in scientific notation:
Put the decimal after the first digit and drop the zeroes.
Example:
In the number 123,000,000,000 The coefficient will be 1.23

To find the exponent count the number of places from the decimal to the end of the number.

In 123,000,000,000 there are 11 places. Therefore we write 123,000,000,000 as:
1.23X10^11 (10 to the 11th power)

Therefore your answer would be:
1.42X10^7 (answer c 1.42X107)

Answer 8

c
1.42 * 10 ^ 7

Answer 9

c