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Question
Make c the subject of the formula a = b(1 + ct). Find c, when a = 1100, b = 100 and t = 4.
Solution
a = b(1 + ct)
⇒ a = b + bct
⇒ bct = a - b
⇒ c = `("a" - "b")/("b""t")`
Substituting a = 1100, b = 100 and t = 4, we get
c = `(1100 - 100)/(100 xx 4)`
= 2.5.
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