Calculate the average speed of a complete round trip in which the outgoing 300 km is covered at 97 km/h, followed by a 1.0-h lunch break, and the return 300 km is covered at 58 km/h.

Average Speed  is 65 km/hr

Step-by-step explanation:

To get the average speed,  first we have to calculate the time spent in the round trip .

Speed= Distance/ time

So,  Time= Distance/Speed

Time Outgoing= 300km/ 97km/hr

Time Outgoing=3.0927 hr

Time lunch break =1 hr

Time return= 300km/ 58km/hr

Time Outgoing=5.1724 hr

Total= 3.0927 hr+1 hr+5.1724 hr=9.2651

To get average speed,  we have to divide all the distance by the time it took al the trip.

Average Speed= Distance/ time

Average Speed= 600km/9.2651 hr= 64,76 km/hr

Average Speed=64,76 km/hr ≅ 65km/hr

which expression can be used to convert 80 us dollars (usd) to australian dollars (aud)?

1 usd = 1.0343 aud

1 aud = 0.9668 usd

step-by-step explanation:

sorry just need the points

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