Answer:
I am guessing 145 so B
Step-by-step explanation:
The 4 is the constant term.
An equation is formed of two equal expressions. It will take for the radioactive element to decay from 960 grams to 295 grams in 25.54 minutes.
<h3>What is an equation?</h3>
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
The radioactive decay of an element is given by the formula,

Given the half-life of the element is 15 minutes, therefore, we can write,

Now, the time it will take for 960 grams to decay to 295 grams is,

Hence, it will take for the radioactive element to decay from 960 grams to 295 grams in 25.54 minutes.
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The rate at which the arrow is fired in km/min 40 km/min
Step-by-step explanation:
Step 1:
Convert the miles in to km.
We have 1 mile = 1.6 km
So 150 mph = 150*1.6 km/hr = 240 km/hr.
Step 2 :
Convert the hours into minutes.
We have 1 hour = 60 mins
So in one hour the arrow travels 240 km, therefore in 1 min it will take 240/60 mins
The rate at which the arrow is fired in km/min is 240/60 = 40 km/min