Some facts about powers of ten are shown.
use what you know about powers of ten to enter numbers that make the equation true.
: (

4.23 * 10³ = 4.23 * 1000 = 4,230

Step-by-step explanation:

We should know that;

10³ = 10 * 10 * 10 = 1000

∴ 4.23 * 10³ = 4.23 * 1000 = = 4,230

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation: