Digital SAT Math Test 2 Question 5

A wildfire can spread triple the area every hour. The size of the wildfire was 10 acres when it was first detected. Which represents the size of the fire, $A$, in acres $t$ hours after the first detection?

$A=10(\frac{1}{3})^t$
$A=\frac{1}{3}(10)^t$
$A=3(10)^t$
$A=10(3)^t$

5/11

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