=> 8 = 8 Maybe?
Sorry if this isnt right!
Answer:43.2
Step-by-step explanation:
first you do 80-40% and then -10%
Answer:
A. 2/5
B. 1/10
Step-by-step explanation:
First off we need to calculate the probability that the chosen child is a girl So to calculate this probability, we have to know the num. of girls which is seen in the table. There are a total of 8 girls.
Therefore the probability of a girl being chosen is equivalent to the number of girls/exact number of children = 8/20 = 2/5 simplified.
Now to find the probability that the chosen girl is left-handed.
The amount of left-handed girls there is only 2. therefore the probability of selecting a left-handed girl will be 2/20 = 1/10 simplified.
Answer:
It will take 13.58 minutes until there are 80 grams of the element remaining
Step-by-step explanation:
An element with a mass of 990 grams decays by 16.9% per minute.
We are supposed to find how long will it be until there are 80 grams of the element remaining
Formula :![N(t)=N_0(1-r)^t](https://tex.z-dn.net/?f=N%28t%29%3DN_0%281-r%29%5Et)
N(t)=Amount after t minutes
=Initial amount
r = rate of decrease = 0.169
t = time in minutes
Substitute the values in the formula :
![80=990(1-0.169)^t](https://tex.z-dn.net/?f=80%3D990%281-0.169%29%5Et)
![\frac{80}{990}=0.831^t](https://tex.z-dn.net/?f=%5Cfrac%7B80%7D%7B990%7D%3D0.831%5Et)
t=13.58
Hence It will take 13.58 minutes until there are 80 grams of the element remaining