( D. 3$ per lb ) 3 times 15 = 45
Let the number be x.
7x-x=42
6x=42
x=7
the number is 7
F(x) = -x² + 49
g(x) = -x + 7
(f - g)(x) = (-x² + 49) - (-x + 7)
(f - g)(x) = (-x² + 49) + (x - 7)
(f - g)(x) = -x² + x + 49 - 7
(f - g)(x) = -x² + x + 42
<h3>
Answer:</h3>
4.42×10^34 molecules/min
<h3>
Step-by-step explanation:</h3>
Multiply the various factors, along with the unit conversion (60 s/min).
... (3.35×10^25 molecules/L) × (2.2×10^7 L/s) × (60 s/min)
... = (3.35×2.2×60)×10^(25+7) molecules/min
... = 442.2×10^32 molecules/min
... ≈ 4.42×10^34 molecules/min
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<em>Comment on scientific notation problems</em>
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