QзA retailer bought several pairs of jeans for \$75,000. He sold all but 30 pairs for \$86,400making a profit of \$70 on each pair sold. How many pairs of jeans did the retailer buy?Q4(i) Eight thousand dollars has to be invested for 10 years. For each option below, calculatthe balance at the end of that time?(a) Option 1: A bank savings account at 7% interest, compounded quarterly.(b) Option 2: A credit union drawing at 6.5% interest compounded monthly.(c) Option 3: A mutual fund 6% annual interest, compounded daily(ii) The value V of a Porsche 718 Cayman that is tyears old can be modeled byV(t) = 420,000(0.965)t(a) What would be worth the car's worth in 2 years?(b) I how may years will the car be worth \$325,000?

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Step 1

We’ll answer the first question since the exact one wasn’t specified. Please submit a new question specifying the one you’d like answered.

Let he bought x pairs of jeans.

So buying cost of one jean = \$(75000/x)

Step 2

He sold all but 30 jeans. So he sold (x-30) jeans

Total selling cost= 86400

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