If the length of a model car is 5 inches & the length of the actual car (real ) is 140 inches. write the scale factor? ? 2 question on a scale drawing the scale factore is 1 in: 6 ft a plum tree is 7 inches tall on the drawing/what is the actual height of the tree?

Part (a):
The scale factor is: 5/140 = 1/28
Part (b):
The actual height of the tree is: 42 ft

Explanation:
Part (a):
The scale factor means the ratio between the actual length and the drawn length. In other words, scale factor is used to tell you how long a unit measurement in your drawing represents in reality.
To find the scale factor, you have to divide the drawn length by the actual length and simplify.
From the given, we have:
drawn length = 5 inches
actual length = 140 inches
Dividing both numbers, we get:
scale factor = 5/140 = 1/28
This means that each 1 inch in the drawing represents 28 inches of the actual length

Part (b):
I have explained what a scale factor is in part (a). Here, we are given that the scale factor is:
1 in : 6 ft
This means that 1 inch on the drawing is used to represent 6 ft in reality.
We are given that the tree is 7 inches on the drawing, so to get the actual length, all we need to do is cross multiplication as follows:
1 in : 6 ft
7 in : ??
actual height = (7*6) / 1 = 42 ft

Hope this helps :)