Answer:
EF = 10
Step-by-step explanation:
DE + EF = DF
5x + x + 8 = 20
6x = 20 - 8
6x = 12
x = 12/6
x = 2
EF = x + 8 = 2 + 8 = 10
Answer:
We can go step by step for this problem by listing out how many blocks for each stack.
Stack 1: 4
Stack 2: 4+9=13
Stack 3: 13+4=17
Now we can sum up the number of blocks in each stack to get 4+13+17=34. The answer is 34.
Answer:
The actual height of telescope is 42.85 inches
Step-by-step explanation:
Given that:
Height of model of telescope = 15 inches
Diameter of model of telescope = 3.5 inches
Actual diameter of telescope = 10 inches
Actual height of telescope = x
Ratio of model's diameter to height :: Ratio of actual diameter to height
3.5 : 15 :: 10 : x
Product of extreme = Product of mean
3.5*x = 10*15
3.5x=150
Dividing both sides by 3.5
Hence,
The actual height of telescope is 42.85 inches
The approximate number for pi is 3.14