Answer:
with T = 50⁰C, we have:
50 = 200 - 5x - x²
<=> x² + 5x = 150
<=> x² + 5x - 150 = 0
=> x = 10
18
Step-by-step explanation:
420mg
0.7x6 = 0.42g which is 420mg
1g = 1000mg