A chemist measures 8 grams of a substance that

has a half-life of 6 hours. Which equation models

the weight, y, of the substance after 15 hours?

Where b is the decay rate for this case. Using the condition given we have:

And our model would be given by:

And replacing the value of t=15 we got:

Step-by-step explanation:

For this case since the half life is 6 hours we have the following condition:

Where is the initial amount

Our model for this case is given by this expression:

Where b is the decay rate for this case. Using the condition given we have:

And solving for b we got:

And solving for b we got:

And our model would be given by:

And replacing the value of t=15 we got:

option: d is the correct answer.

d) none of the above.

step-by-step explanation:

clearly from the figure attached to the question we could see that there is no shape given. hence without any shape given in the figure and after rotation we can't obtained a square pyramid.

since, to obtain a image we need a proper figure of the pre-image so that it can be transformed.

hence, the correct answer is:

d) none of the above.

step-by-step explanation: