He did not perform enough trials. The more trials you perform, the closer it gets to the predicted outcome.
Answer:
15 or below
Step-by-step explanation:
10+10+8+8 = 36
51-36 = 15
Less than or equal to = 15 or below
450/5= 90 units
90/5= 18 units
All you need to do is divide the real dimensions by the scale dimensions, and turn that answer to units. Notice: It said 1 unit: 5 feet
The scale drawing was 90 to 18 units.
I hope this helps!
~kaikers
Multiply the second fraction by three.
4/9 + 3/9 = 7/9