4 thousands equals 40 hundreds.
-- 3 bakers produce 15 cakes in 60 minutes.
-- Each baker produces 15/3 = 5 cakes in 60 minutes.
-- Each baker takes 60/5 = 12 minutes to produce 1 cake.
-- 6 bakers can produce 6 cakes in 12 minutes.
-- 20 cakes will take 20/6 = (3 and 1/3) as much time as 6 cakes.
-- (3 and 1/3) times 12 minutes = <em>40 minutes</em>.
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An easier way to do it:
-- 3 bakers produce 15 cakes in 60 minutes.
-- 6 bakers could produce 30cakes in 60 minutes.
-- Only 20 cakes are needed. That's only (20/30) = 2/3 of 30 cakes.
-- So it will only take them 2/3 of 60 minutes = <em>40 minutes</em> to make them.
Hello,
1: 9n-3=21 ==>B
2: 3n+9=21 ==>A
3: 9n-3=21 ==>B
4: 3n-9=21 ==>C
I wish to have understood all those sentences.
Answer:
$325
Step-by-step explanation:
