In the given exercises, use an integer to express each number in boldface italics representing a change.

From $2006$ to $2007$, attendance at the World Series went from $225,000$ to $173,000$, a decrease of $52,000$.

What happened to cigarette smoking among teenagers between 1998 and 2006?

The base of a circular fence with radius 10 m is given by $x = 10\cos t, y = 10\sin t$. The height of the fence at position $(x, y)$ is given by the function $h(x, y) = 4 + 0.01(x^2 - y^2),$ so the height varies from 3 m to 5 m. Suppose that 1 L of paint covers 100 m$^2$. Sketch the fence and determine how much paint you will need if you paint both sides of the fence.

What is $\mathrm { NAD } ^ { + } ?$ Why is it important?

The base of a circular fence with radius 10 m is given by x = 10 cos t, y = 10 sin t. The height of the fence at position (x, y) is given by the function

$$h(x, y) = 4 + 0.01(x^2-y^2),$$

so the height varies from 3 m to 5 m. Suppose that 1 L of paint covers 100 m^2. Sketch the fence and determine how much paint you will need if you paint both sides of the fence.

Ernie and Mike painted a fence together in $a$ hours. It would have taken Ernie $b$ hours to paint the fence by himself. What fraction of the fence did Ernie paint? What fraction of the fence did Mike paint?

Paul wanted to fence in a square pasture for Babe, his blue ox. Each side needed to be 25 miles long. How many miles of fence did Paul need for the pasture?

Find the product of the given triplet of binomials.

$$(x+5)(x+7)(-x+1)$$

Find the product of the given triplet of binomials.

$$(2 x-3)(x+7)(x+6)$$

Find the product of the given triplet of binomials.

$$(x+3)(x-4)(x-5)$$

Find the product of the given triplet of binomials.

$$(4 x-1)(2 x-1)(3 x-2)$$

Find the product of the given triplet of binomials.

$$(x-9)(x-2)(3 x+2)$$

Find the product of the given triplet of binomials.

$$(x-1)(-2 x-5)(x-8)$$

Find the product of the given triplet of binomials.

$$(x+9)(x-2)(x-7)$$