Use a calculator to work these exercises. (See Examples 9 and 10.) Water Pollution High concentrations of zinc ions in water are lethal to rainbow trout. The function f ( x ) = ( x 1960 ) − .833 gives the approximate average survival time (in minutes) for trout exposed to x milligrams per liter (mg/L)of zinc ions. Find the survival time (to the nearest minute) for the given concentrations of zinc ions. 110 525 1960 4500
Use a calculator to work these exercises. (See Examples 9 and 10.) Water Pollution High concentrations of zinc ions in water are lethal to rainbow trout. The function f ( x ) = ( x 1960 ) − .833 gives the approximate average survival time (in minutes) for trout exposed to x milligrams per liter (mg/L)of zinc ions. Find the survival time (to the nearest minute) for the given concentrations of zinc ions. 110 525 1960 4500
Solution Summary: The author calculates the survival time for 110 milligrams per liter of zinc ions by using the function f(x).
Use a calculator to work these exercises. (See Examples 9 and 10.)
Water Pollution High concentrations of zinc ions in water are lethal to rainbow trout. The function
f
(
x
)
=
(
x
1960
)
−
.833
gives the approximate average survival time (in minutes) for trout exposed to x milligrams per liter (mg/L)of zinc ions. Find the survival time (to the nearest minute) for the given concentrations of zinc ions.
Question 4 Find an equation of
(a) The plane through the point (2, 0, 1) and perpendicular to the line x =
y=2t, z=3+4t.
3t,
(b) The plane through the point (3, −2, 8) and parallel to the plane z = x+y.
(c) The plane that contains the line x =
parallel to the plane 5x + 2y + z = 1.
1+t, y2t, z = 43t and is
(d) The plane that passes through the point (1,2,3) and contains the line
x = 3t, y=1+t, and z = 2 – t.
(e) The plane that contains the lines L₁ : x = 1 + t, y = 1 − t, z =
=
L2 x 2s, y = s, z = 2.
2t and
2
5x
+
2–49
2
x+10x+21
Chapter 3 Solutions
Mathematics with Applications In the Management, Natural, and Social Sciences (12th Edition)
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