Aradioactive element has a half-life of six days. what is the approximate decay rate of the element after the first day? 0.9% 1.5% 8.3% 10.9%

10.9%

Step-by-step explanation:

Formula of Half life :

Now we are given half life = 6 years

So,  

where  = initial amt.  

 = remained after t time  

= half life period  

So  

So, decayed amount = 1- 0.89 = 0.109  

So , decay rate of the element after the first day =

                                                                                 =

Hence the approximate decay rate of the element after the first day is 10.9%

answer: yes youre right.

step-by-step explanation:

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet