The half-life of the radioactive substance is 67.95 hours.
8.4 because 6 would round up to 10 and 10+30 =40 for 8.40 or just 8.4
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Answer:
1 +i√3.5
Step-by-step explanation:
In vertex form, the equation is ...
2(x² -2x +1) +7 = 0
2(x -1)² +7 = 0
Then the solutions are ...
(x -1)² = -7/2
x = 1 ±i√3.5
One solution is 1+i√3.5.
Answer:
4 because the edges are like vertices.
Answer:
the first one but make sure to divide
Step-by-step explanation:
