Question

Pls answer this.....really need help pleaseee <3

Answer 1

Answer:

Step-by-step explanation:

1. 1.2×10³ as an ordinary number?

$1.2\times\:10^3\\\\10^3=1000\\\\=1000\times\:1.2\\\\=1200$

2.

$200 000= 2\times 10^5\\\\200 000 =200\times 10^3$

$54000 =54\times 10^3$

$327000 = 327\times 10^3\\\\327000 = 32.7\times 10^4$

3.

$149 000 000\:km \\\\=149\times 10^6\\ or\\14.9\times 10^7$

4.

5.

$0.05 = 50\times 10^-^3\\ \\0.807=807\times 10^-^3\\\\0.00261=2.61\times 10^-^3$

6.

$0.000139\:m = 1.39\times 10^-4$

7. I think all the numbers are written in standard form

Answer 2

Answer:

1.) 1200

2.) 200,000= 2.0 × 10⁵ .  54000 = 5.4 × 10⁴ .  127000 = 1.27 × 10⁵

3.) 149000000 = 1.49  × 10⁸

4.) 2.5 × 10⁻² = 0.025

5.)  5 × 10⁻² .  8 × 10⁻¹    0.00261 = 2 × 10⁻³

6.)  0.000139m  = 1.39 × 10⁻⁴

7.) 0.6 × 10⁶ changes to 6.0 × 10⁵

0.54 × 10⁻¹²  changes to 5.4 × 10⁻¹³

8 × 10⁻⁵ changes to 8.0 × 10⁻⁵

10 × 10³ changes to 10 × 10⁴

44 × 10⁷  changes to 4.4 × 10⁸

1 × 10² changes to 1.0× 10²

Step-by-step explanation:

1. Positive exponents: Whatever the Power of 10 in standard form, move the decimal that many places to the right.

2,3 & 7.  Standard Form always uses One digit to the left of the decimal, then some power of 10. That digit must be equal or greater than 1, but less than 10. There must be at least one digit to the right of the decimal, even if it is 0.

4. Negative exponents: Whatever the Power of 10 in Standard Form, move the decimal that many places to the left to write as a regular decimal (old fashioned)

5 & 6. Reverse of 4.  How many places you moved the  decimal to the right, thats the number you put as the negative exponent of 10 in Standard Form.

7. AAUGH! Same as 2 & 3 but more confusing! There are rules!

I hope this helps.

Check out Scientific Notation, another name for Standard Form.