Answer:
The time take is 
Explanation:
From the question we are told that
The decay constant is 
The percentage fall is 
The equation for radioactive decay is mathematically represented as
Where is 
is the new amount of the new the isotope while 
is the original
At initial 
% = 1
At 
% = 0.80
=> 
=>
Answer: The closer the planet is to the sun, the faster it travels
Explanation:
The speed of the planets goes down as the chart shows planets farther away from the sun
I believe that the statement is true. <span>Investigations allow for the control of variables. Changing variables will lead you to observations that may prove your hypothesis. Hope this answers the question. Have a nice day. Please feel free to ask more questions.</span>
Answer:
direct current
Explanation:
it has a direct path to go down to reach the specific point
One is bigger than the other and they are the same shape
