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alisha [4.7K]
3 years ago
14

Solve this problem in your notebook using all four steps. Harvey is 3 times as old as Jane. The sum of their ages is 48 years. F

ind the ages of Harvey and Jane. Jane is a0 years old. Harvey is a1 years old.
Mathematics
1 answer:
spayn [35]3 years ago
5 0
H=3J
(1a)+(3a)=48
J. H.

J=12
H=36
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Answer:

x = 0.53 cm

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Step-by-step explanation:

Refer to the attached diagram:

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V = Length \times Width \times Height \\\\

Let x denote the length of the sides of the square as shown in the diagram.

The width of the shaded region is given by

Width = 3 - 2x \\\\

The length of the shaded region is given by

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V =  \frac{1}{2} (5 - 3x) \times (3 - 2x) \times x \\\\V =  \frac{1}{2} (5 - 3x) \times (3x - 2x^2) \\\\V =  \frac{1}{2} (15x -10x^2 -9 x^2 + 6 x^3) \\\\V =  \frac{1}{2} (6x^3 -19x^2 + 15x) \\\\

In order to maximize the volume enclosed by the box, take the derivative of volume and set it to zero.

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We are left with a quadratic equation.

We may solve the quadratic equation using quadratic formula.

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Volume of the box at x= 1.59:

V =  \frac{1}{2} (5 – 3(1.59)) \times (3 - 2(1.59)) \times (1.59) \\\\V = -0.03 \: cm^3 \\\\

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Therefore,

x = 0.53 cm

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