Radioactive iodine is used to determine the health of the thyroid gland it decays according to the equation y=ae^-0.0856t where t is in days find one fourth life of this substance

16.19 days.

Step-by-step explanation:

The radioactive iodine is used to determine the health of the thyroid gland and it decays according to the equation where t is in days and a is the initial amount and y is the final amount after decay for t days.

We have to find a one-fourth life of this substance.

So,

⇒

Now, taking ln both sides we get,

ln (0.25) = - 0.0856t ln e {Since, }

So, t = 16.19 days. (Answer)

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry