Mobile phone calls are charged at 17 cents per 30 seconds.
2 answers:
0.17/30 = x/450 <em>Use proportion</em>
76.50 = 30x <em>Cross multiply</em>
2.55 = x <em>Divide 30 both sides</em>
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7.5 minutes call would cost 2.55
Answer:
255 ¢ or 2.55$
Step-by-step explanation:
i counted like this
l 30 seconds = 1
l 1 minute = 2
l 1.5 minutes = 3
l 2 minutes = 4
l 2.5 minutes = 5
l 3 minutes = 6
l 3.5 minutes = 7
l 4 minutes = 8
l 4.5 minutes = 9
l 5 minutes = 10
l 5.5 minutes = 11
l 6 minutes = 12
l 6.5 minutes = 13
l 7 minutes = 14
l 7.5 minutes = 15
So then 17 ¢ x 15 = 255 ¢
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Hope it helps</em></u></h3>
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