9 mph because if it was 4/5 miles in 1/10 of an hour you just multiply it by 10 to get an hour and if you multiply 4/5 x 10 equals 40/5. simplified it is 9
So 4/5 should be an 80 because if you multiply 5x20 and 4x20 you would get 80/100 but sometimes teachers make certain questions worth more points than others so maybe that is what happened but maybe talk to your teacher about it
Answer:
it won't let me message back.
Step-by-step explanation:
<span> For this case we have the following function:
</span>

<span> When the food package is on the plane, we have that the height of the package is given by:
</span>

<span> Rewriting we have:
</span>

<span>
When, time passes, the height decreases.
When the time is 40 seconds (x = 40) the package reaches the ground and the height is 0.
Therefore, a reasonable domain for the function is:
0 ≤ x ≤ 40
Answer:
0 ≤ x ≤ 40</span>
It is true because if a is perpendicular to b and b is perpendicular to c therefore a has to be perpendicular to c also they said that all three lines are coplanar therefore the statement must be true
I hope this helped you out :)