Calculate the scale factor. a. k=1/7 b. k=5/7 c. k=7/5 d. k=5

Answer is Option B = 5/7

Explanation:

A scale factor is a number which scales, or multiplies, some quantity. In the equation y = Kx, K is the scale factor for x. K is also the coefficient of x, and may be called the constant of proportionality of y to x.  

For big pictures or maps, images should be drawn without affecting the shape in a small paper.  Hence dimension of x is reduced to y with constant proporiton k which is scale factor

Here we find that original length of PC = 21

In image P'C = 15

Hence scale factor=15/21 = 5/7

207/8 is the right

i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )