The function a=a_oe^{-0.01155x} a = a o e − 0.01155 x models the amount in pounds of a particular radioactive material stored in a concrete vault, where a_o a o is the original amount of material and x is the number of years since the material was put in the vault. if 900 pounds of material are placed in the vault, how much time will need to pass for only 357 pounds to remain? round your answer to the nearest tenth.

80.1 years of time will be needed to pass.

Step-by-step explanation:

Given expression:

Given :

A = 357 pounds

x = ?

Using the given expression:

Taking ln both sides:

x = 80.0570 years ≈ 80.1 years

80.1 years of time will be needed to pass.

not enough information

step-by-step explanation:

we cannot know this, because the other students could have handed out 10 flyers, or they could have handed out 100. one way, the mean would go up, and another way, the mean would go down.

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8