The formula
d
=
1.3
t
2
+
t
+
2
expresses a car's distance (in feet to the north of an intersection,
d
, in terms of the number of seconds
t
since the car started to move. as the time
t
since the car started to move increases from
t
=
8
to
t
=
8.2
seconds, what constant speed must a truck travel to cover the same distance as the car over this 0.2-second interval?

The truck travel must to have a constant speed of

Step-by-step explanation:

we have

where

d expresses a car's distance in feet

t is the number of seconds

Find the distance d for t=8 sec

Find the distance d for t=8.2 sec

The total distance in this interval of 0.2 sec is

Find the speed of the car

Divide the total distance by the time

therefore

The truck travel must to have a constant speed of

answ9x x 3=

step-by-step explanation:

if x = 1, then the answer is 3.5