S(x) = -x3 + 6x2 + 288x + 4000, 4 x 20 is an approximation to ...

[tichca]

S(x) = -x3 + 6x2 + 288x + 4000, 4 ≤ x ≤ 20 is an approximation to the number of salmon swimming upstream to spawn, where x represents the water temperature in degrees Celsius. Find the temperature that produces the maximum number of salmon.
◦ 12°C
◦ 20°C
◦ 4°C
◦ 8°C

[sabina576]

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[P68T]

S(x) = -x3 + 3x2 + 189x + 1200, 2 ≤ x ≤ 9 is an approximation to the number of salmon swimming upstream to spawn, where x represents the water temperature in degrees Celsius. Find the temperature that produces the maximum number of salmon.
◦ 8°C
◦ 3°C
◦ 9°C
◦ 2°C

[jsm54321]

9°C

[P68T]

Excellent

[jsm54321]

Great! Please up vote

[oliviahorn72]

S(x) = -x3 - 45x2 + 525x + 1429, 0 ≤ x ≤ 15 is an approximation to the number of salmon swimming upstream to spawn, where x represents the water temperature in degrees Celsius. Find the temperature that produces the maximum number of salmon.
◦ 5°C
◦ 12.5°C
◦ 10°C
◦ 0°C

[Awesome]

5°C