Question

@Michele_Laino

Answer 1

Sorry, you have to calculate the value of your function at time t=1, and t=4, so please substitute those value in your function f(t)=6t^2+2t, and you will get two values, for f, please write them!

Answer 2

namely: f(1)=...
and f(4)=...

Answer 3

that's right, now, by definition of average spedd, you have to calculate this ratio:
\[\frac{ f(4)-f(1) }{ 4-1 }\]

Answer 4

please try!

Answer 5

you have to calculate this ratio, please:
\[\frac{ 104-8 }{ 4-1 }\]

Answer 6

its value

Answer 7

perfect, it is your average speed, don't forget to indicate the right unit of measure

Answer 8

yes, and time=hours, as I read from the text of your problem

Answer 9

miles/hours

Answer 10

thanks!