Mr. mole left his burrow that lies 7 meters below the ground and started digging his way deeper into the ground, descending at a constant rate. after 6 minutes, he was 16 meters below the ground. let a represent mr. mole's altitude (in meters) relative to the ground after ttt minutes.

Step-by-step explanation:

We are given that

Mr. mole left his burrow that lies 7 meter below the ground .

Therefore, the coordinates of the point (0,-7).

Because initially t=0 and y=-7

After 6 minutes ,

He was 16 meters below the ground.

Therefore, the coordinates of the point (6,-16).

When A represent Mr. Mole's altitude (in m) relative to the ground after t  minutes.

Then, we hate to find the function A(t).

When he started digging his way deeper into ground , at a constant rate.

Then, the rate of change=

Rate of change=-1.5 m/s

The negative sign shows that rate of change decreases.

Therefore, the function

Substitute the values

Then, the function

Here, negative shows that the altitude decreases with time.

no not all of them.

step-by-step explanation:

some of them have a square base.