Huu ni mfano wa riba ya kiwanja (compound interest). Fomula ya riba ya kiwanja ni A = P(1 + r)ⁿ, ambapo:
Chemistry
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7 steps4)
Huu ni mfano wa riba ya kiwanja (compound interest). Fomula ya riba ya kiwanja ni , ambapo:
- ni kiasi cha mwisho
- ni kiasi cha awali (principal)
- ni kiwango cha riba kwa mwaka (rate)
- ni idadi ya miaka (time)
Kokotoa kiasi cha awali alichoweka shambani.
Mkulima aliuza magunia 200 ya mahindi kwa Sh 5000 kila moja.
Tambua kiwango cha riba na muda.
Kiwango cha riba () = 10% p.a. =
Muda () = miaka 3Tumia fomula ya riba ya kiwanja.
Kokotoa kiasi cha mwisho.
Kiasi katika akaunti yake ya akiba baada ya miaka 3 ni .
5)
Huu pia ni mfano wa riba ya kiwanja. Fomula ya riba ya kiwanja ni .Tambua kiasi cha awali, kiwango cha riba, na muda.
Kiasi cha awali () = Sh 150,000
Kiwango cha riba () = 10% p.a. =
Muda () = miaka 3Tumia fomula ya riba ya kiwanja.
Kokotoa kiasi cha mwisho.
Kiasi cha pesa alicholipa Wepukhulu baada ya miaka mitatu ni .
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