An insect moves at a speed of 3/(20) feet per second. What is this speed, in yards per second? ( 3 feet = 1 yard)

The correct answer is A. Choice A is correct. It's given that 3 feet = 1 yard . It follows that a speed of 3/(20) feet per second is equivalent to ( (3/(20) feet)/(1 second) ) ( (1 yard)/(3 feet) ) , which is equivalent to ( 3/(20) ) ( 1/3 ) , or 1/(20) , yards per second.

Note: The expression \frac{3}{20}\cdot\frac{1}{3} in Desmos evaluates to 0.05, which is \frac{1}{20}.

SAT Question 674a4084: Answer, Explanation & Desmos Solution

Math - Ratios Rates Proportional Relationships And Units - Unit ConversionMath Practice - Problem Solving And Data Analysis - Ratios Rates Proportional Relationships And Units - Unit Conversion90 questions

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An insect moves at a speed of $\frac{3}{20}$ feet per second. What is this speed, in yards per second? ( $3$ feet = $1$ yard)

39

Difficulty:Medium

A

$\frac{1}{20}$

B

$\frac{9}{20}$

C

$6$

D

$20$

Explanation

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Why the other choices are wrong

SAT Question 674a4084: Ratios Rates Proportional Relationships And Units answer and explanation with Desmos solution

Explanation

Enter in Desmos:

Why the other choices are wrong