An athlete runs a distance of 345 metres (to the nearest metre) in a time of 44.6 seconds (to the nearest 0.1 second).
What is her slowest possible speed?

7.716 (with margin: 0.001)

Step-by-step explanation:

speed = distance ÷ time

For speed to be at a minimim you need distancemin ÷ timemax

Min distance = 345 - 0.5 = 344.5m

Max Time = 44.6 + 0.05 = 44.65 sec

speedmin=344.5 ÷ 44.65 = 7.7155 = 7.716 m/s (3 dp)

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5

step-by-step explanation:

mean or average is 40.6