Question

What is the following number in decimal form?

8.61 × 10 –8

A.
0.000000861

B.
0.0000000861

C.
8,610,000

D.
861,000,000

Answer 1

First you should simplify \(10^{-8}\).

Answer 2

i think i got it

Answer 3

\(10^{-8} \rightarrow \dfrac{1}{10^8}\)

Answer 4

ummm....i think the answer is D. Am i correct?

Answer 5

because....

Answer 6

let me explain

Answer 7

No, actually C and D are wrong..because our answer will be a decimal.

Answer 8

what do you mean

Answer 9

10^-8 = -10 x -10 x -10 x -10 x -10 x -10 x -10 x-10

Answer 10

which gives me 100,000,000

Answer 11

then 8.61 x 100,000,000 gives me 861,000,000

Answer 12

or C thats the ones i am thinking because it isn't 100,000,000 x 8.61 it is 8.61 x 100,000,000

Answer 13

and i get C

Answer 14

Confused plz help

Answer 15

i only think D is the answer but not so sure anymore

Answer 16

what do you think and why

Answer 17

\[10^2=100 \\ \text{ where as } \\ 10^{-2}=0.01\]
so your 10^(-8) will be a decimal number as suggested above

Answer 18

When you multiply a number by an integer power of ten, look at the exponent of 10. If the exponent is positive, move the decimal point of the number that number of places to the right. If the exponent is negative, move the decimal point that number of places to the left.

Answer 19

How

Answer 20

oh

Answer 21

Examples:
5.2 * 10^5 = 520,000
3.6 * 10^-4 = 0.00036

Answer 22

B?