How many integers between 1000 and 2000 have all three of the numbers 15,20 and 25 as factors

3

Step-by-step explanation:

We have that,

Least common multiple of the numbers 15, 20 and 25 is 300.

So, any number being factor of 300 will also be a factor of all three numbers 15, 20 and 25.

Now, the factors of 300 in the range 1000 and 2000 are 1200, 1500 and 1800.

So, the numbers 1200, 1500 and 1800 will have the numbers 15, 20 and 25 as factors.

Hence, there are three numbers having 15, 20 and 25 as factors.

step-by-step explanation:

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