Tell me whats 400+800+900?

2,100

Step-by-step explanation:

400+800=1,200

1,200+900=2,100

2,100

Step-by-step explanation: You need to align all the numbers horizontal and you add each number in each row.

400

800

900

———

2100

answer: i believe it’s 245.04

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