Question

Mary is converting 30 yards per hour into feet per hour. Which conversion factor should she use?

A. 60 min/1h

B. 1h/60 min

C. 3ft/1 yd

D. 1 yd/3ft

Answer 1

do yall know it

Answer 2

how many feet in 1 yard?

Answer 3

3 feet

Answer 4

thank you

Answer 5

\(\bf \cfrac{30yd}{hr}\cfrac{\Longleftarrow top}{\Longleftarrow bottom}\\ \quad \\\textit{so you use the flipped version of the conversion units}\\ \quad \\
\cfrac{3ft}{yd}\cfrac{\Longleftarrow top}{\Longleftarrow bottom}\qquad thus \qquad
\cfrac{30\cancel{yd}}{hr}\cdot \cfrac{3ft}{\cancel{yd}}\implies \cfrac{90ft}{hr}\)