A. Dual enrollement courses allow the student to earn both high school and college credit
If the half-life is 5 minutes, then 30 minutes is equivalent to 6 half-lives. So, after six successive half-lives, the 400 mg of the radioisotope would have a mass of 400(0.5)⁶ = 6.25 mg.
Thus, A would be the correct answer choice here.
The answer would be: Intake, Compression, Power, and Exhaust.
<span>Intake: also known as induction or suction.
Compression: starts at the end of the suction stroke, and ends at T.D.C.
<span>Power: also known as combustion. This is the start of the second revolution of the four stroke cycle.
</span><span>Exhaust: also known as outlet. In here, the piston once again returns from B.D.C. to T.D.C. while the exhaust valve is open. This action eliminates the spent air-fuel mixture through the exhaust valve.</span></span>
