Question

Express 0.00689 in standard form
Express 0.004112 in standard form
Express 245000 in standard form
Express 550 in standard form
Express 489600000 in standard form

Answer 1

Answer:

1) 0.00689 x10 to the power of 5

2) 0.004112 x10 to the power of 6

3)2.45 x10 to the power of 5

4)5.5 x10 to the power of 2

5)4.896 x10 to the power of 8

Step-by-step explanation:

you get all sig figs and put them in (if there are 00s before add them in aswell) then put x10 to the power of an how many after e.g. 10,000,000 in standard form = 1 x10 to the power of 7 because 0 is not a sig fig

sig fig - significant figure ( any figure /number above 0)

hope this helped

Answer 2

Answer:

1) 6.89 times 10 to the power of -3

2) 4.112 times 10 to the power of -3

3) 2.45 times 10 to the power of 5

4) 5.5 times 10 to the power of 2

5) 4.896 times 10 to the power of 8

Step-by-step explanation:

a x 10^a

a= a number between 1-9 (can be negative)

^a= a whole number ( can be negative)

examples                                   non examples

2.53 x 10^3                                13 x 10^5 ( can't be as 13 is bigger than 9)

1 x 10^7                                       0.75 x 10^4 ( 0.75 is less than one)

4.62 x 10^5

8.563 x 10^17

1.4 x 10^-8

another example=

91900000 = 9.19 x 10^7

0.0000000981 = 9.81 x 10^-8

hope this helps, other people too. It's a bit late sorry

xx

b.t.w this is called Standard Form and sometimes Standard Index Form