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Zinaida [17]
3 years ago
7

1)Pong paid $20.40 in interest on her credit card last month. The monthly interest rate for her credit card is 1.7% of the balan

ce she owes. What was Pong’s balance last month? 3 marks
Mathematics
1 answer:
mote1985 [20]3 years ago
4 0
We name her balance B so we have

B x1.7%=20.40
B x 1.7/100=20.40
B x 1.7=20.40 x 100
B x 1.7=2040
B=2040/1.7
B=1200

Maybe we could substract the amount that she paid for the interest so her balance may be 1200-20.40=1179.60 instead of 1200
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MrBillDoesMath!


Answer to #4:  81/256 * s^8 * t^ 12


Comments:

(7x^3) ^ (1/2)   =  7 ^ (1/2)  *  x^(3/2)   where  ^(1/2) means the square root of a quantity. The answer written (7x^3) is NOT correct.

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(1)             (27s^7t^11)^ (4/3)  

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