SAT Math question help! – Khan Academy Centre d'aide

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Cynthia DiFrancesco Polakovic

22 octobre 2019 13:52

1

Here is the way I solved this:

$9.88 (.04) = .395 or .40 This is the fee charged.

$9.88 - .40 = $9.48 (dollar amount spent without charge).

602/9.48 = 63.50 r/$

The answer key says 63 r. Would my answer be marked wrong?

Thank you!

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2 commentaires

Cynthia DiFrancesco Polakovic

22 octobre 2019 13:53
0

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If I round up, I would have written 64 r.
Kareem Hashish

5 novembre 2019 20:43
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Let x be the original charge before the 4% tax

x+(0.04)x= 9.88

(1.04)x= 9.88

x= 9.5 , so 9.5 was the original price before the implemented tax

and when you divide the 602 rupees by the original price in dollars to get the exchange rate 602/9.5
you'll get 63.3, rounding it to next whole number makes it 63.

I hope I helped you ♥

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