Aparticle moving along a line has position s(t) = t^4 − 20t^2 m at time t seconds. determine: (a)- at which times does the particle pass through the origin? (b)- at which times is the particle instantaneously motionless.

Step-by-step explanation:

when s(t)=0

t^4-20t^2=0

t^2(t^2-20)=0

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.