a spray can is usedto paint a wall .the thickness of the paint on the wall is t.the distance of the spray can from the wall is d. t is inversly proportional to the square of d. t=0.2 when d=8.find t when d=10

t = 0.128

Step-by-step explanation:

Proportionality

We are given the following proportionality rule: t is inversely proportional to the square of d. This can be written as:

Where k is the constant of proportionality. It can be found by using the condition: t=0.2 when d=8. Substituting:

Solving for k:

k=12.8

The equation is:

When d=10:

t = 0.128

This is most definately an impulse purchase because Ronnie had not planned to buy the stereo speaker, but had a impulse to buy it even  when he didn't have the money. Had he already decided he wanted the stereo and went to the store to buy it that would not be an impulse purchase it would be a planned purchase.

hope this helps mark me brainliest if it helped