Answer:
314 m²
Step-by-step explanation:
the formula for the surface area of a sphere (As) is
As = 4×pi×r²
the radius r (half of the diameter) is clearly indicated as 5m.
so, As = 4×3.14×5² = 4×3.14×25
I don't even need a calculator for this, as 4×25 = 100
so, As = 100×3.14 = 314
(you know, when multiplying by 10, the decimal point moves right one position. multiply by 100 it moves 2 positions, and so on).
Answer:
20% increase
Step-by-step explanation:
30-25=5
solve for x
(5*100)/25 = 20
Answer:
52
Step-by-step explanation:
Multiply grams per gallon times gallons to get grams.
Answer:
Step-by-step explanation:
We use binomial expansion for
This can be rewritten as
From the expansion
Setting and ,
Multiplying by ,
The limit of this as is
(since all the other terms involve and vanish to 0.)