SAT question 3ac09984 (Ratios Rates Proportional Relationships And Units)

Question

Marta has 7,500 pesos she will convert to US dollars using a currency exchange service. At this time, the currency exchange rate is 1 peso = 0.075 US dollars. The exchange service will charge Marta a 2% fee on the converted US dollar amount. How many US dollars will Marta receive from the currency exchange after the 2% fee is applied?

College Board · Accepted Answer

The correct answer is A. Choice A is correct. At the exchange rate of 1 peso = 0.075 US dollars, 7,500 pesos would be converted to 7,500 × 0.075 = 562.50 US dollars. However, since Marta pays a 2% fee on the converted US dollar amount, she receives only (100 - 2)% , or 98% , of the converted US dollars, and 562.50 × 0.98 = 551.25 US dollars.

CookSAT · Answer

Note: Evaluate the converted amount after the 2% fee in one step: 7500 × 0.075 × 0.98.

Explanation

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Why the other choices are wrong

SAT Question 3ac09984: Ratios Rates Proportional Relationships And Units answer and explanation with Desmos solution

Explanation

Enter in Desmos:

Why the other choices are wrong