For each 70 mm of coloured fabric Alex uses to make his curtains, he also uses 20 cm of white fabric. Express the amount of white fabric to coloured fabric as a ratio in its simplest form.

2:70 cm

Step-by-step explanation:

10 millimeters are in 1 centimeter so you take 70 mm and multiply it by 10 which gives you 700 centimeters. so therefore the answer would be 20:700 but you can simplify that by taking off the zeros, so take off 1 zero off of both  umbers and you have 2:70

sss (side, side, side)

sas (side, angle, side)

asa (angle, side, angle)

aas (angle, angle, side)

hl (hypotenuse, leg)

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents