Answer:
Step-by-step explanation:
We know that the general form of the exponential decay formula is
, where y is final amount remaining after t time, A is the original amount and r is the rate of decay
Now, the ratio of strontium-90 remaining, p , as a function of years, t , since the nuclear accident.
Hence, the ratio of remaining since the nuclear accident is
76 degrees. Angle y is supplementary to angle “2x+20”.
Answer:
x = 1, x = -1
Step-by-step explanation:
-4x² = -4
x² = 1
x =
x = ±1
Answer:
100 gm calcium, 30gm carbon and 120gm oxygen
Step-by-step explanation:
10% of a kg is 100gm of calcium, 3% of 1 kg is 30gm of carbon and 12% of a kg is 120gm of oxygen