5. A MP8 Mack Semi Truck Diesel Engine has the volume of 780 cubic inches
Part A: Which scale model n has the greatest engine volume, a 1:8 scale model or a 1/24
scale model
Part B: How much greater volume does the bigger scale model have?

A) 1:8 scale model has the greatest engine volume

B) 1.467 cubic inches

Step-by-step explanation:

Part A

For the scale 1:8 the volume of the scale engine is:

(1/8)³ = V/780

V = 780/8³

V = 1.523 cubic inches

For the scale 1:24 the volume of the scale engine is:

(1/24)³ = V/780

V = 780/24³

V = 0.056 cubic inches

Part B

The difference between both volumes is: 1.523 - 0.056 = 1.467 cubic inches

the answer is 96 degrees

step-by-step explanation:

you have to realize that a line equals 180 degrees

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional