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calculusxy
 one year ago
MEDAL!!!
calculusxy
 one year ago
MEDAL!!!

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freckles
 one year ago
Best ResponseYou've already chosen the best response.2you are given the distance and you are given the amount of time

calculusxy
 one year ago
Best ResponseYou've already chosen the best response.2so would i have time be 4 1/3 hr?

freckles
 one year ago
Best ResponseYou've already chosen the best response.2\[20 \text{ minutes}=20 \text{minutes} \cdot \frac{1 \text{ hour }}{60 \text{ minutes}}=\frac{20}{60} \text{ hours }=\frac{1}{3} \text{ hours } \\ \text{ so you have she drove } 500 \text{ km } \text{ in } 4 \frac{1}{3} \text{hours }\] so you time thing is right you might consider it better to write as an improper fraction though

freckles
 one year ago
Best ResponseYou've already chosen the best response.2\[4 \frac{1}{3} \text{ hours}=\frac{13}{3} \text{ hours }\] or I guess a decimal would even work

freckles
 one year ago
Best ResponseYou've already chosen the best response.2\[\text{ so her speed was } \frac{500 km }{\frac{13}{3} hours }=500 \cdot \frac{3}{13} \frac{ km}{hr} = \frac{1500}{13} \frac{km}{hr}=115.4 \frac{km}{hr}\] yes b is the closest one

freckles
 one year ago
Best ResponseYou've already chosen the best response.2I should have put an approximation sign betwoo 1500/13 and 115.4

freckles
 one year ago
Best ResponseYou've already chosen the best response.2\[\text{ so her speed was } \frac{500 km }{\frac{13}{3} hours }=500 \cdot \frac{3}{13} \frac{ km}{hr} = \frac{1500}{13} \frac{km}{hr} \approx115.4 \frac{km}{hr}\]
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