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# Solutions for Chapter 7.4: Precalculus 5th Edition

## Full solutions for Precalculus | 5th Edition

ISBN: 9780321837349

Solutions for Chapter 7.4

Solutions for Chapter 7.4
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##### ISBN: 9780321837349

Precalculus was written by Sieva Kozinsky and is associated to the ISBN: 9780321837349. This expansive textbook survival guide covers the following chapters and their solutions. Since 14 problems in chapter 7.4 have been answered, more than 2734 students have viewed full step-by-step solutions from this chapter. Chapter 7.4 includes 14 full step-by-step solutions. This textbook survival guide was created for the textbook: Precalculus, edition: 5.

Key Calculus Terms and definitions covered in this textbook
• Average rate of change of ƒ over [a, b]

The number ƒ(b) - ƒ(a) b - a, provided a ? b.

• Binomial probability

In an experiment with two possible outcomes, the probability of one outcome occurring k times in n independent trials is P1E2 = n!k!1n - k2!pk11 - p) n-k where p is the probability of the outcome occurring once

• Double-angle identity

An identity involving a trigonometric function of 2u

• Expanded form

The right side of u(v + w) = uv + uw.

• Explanatory variable

A variable that affects a response variable.

• Exponential regression

A procedure for fitting an exponential function to a set of data.

• Independent events

Events A and B such that P(A and B) = P(A)P(B)

• Intercepted arc

Arc of a circle between the initial side and terminal side of a central angle.

• Law of sines

sin A a = sin B b = sin C c

• Leaf

The final digit of a number in a stemplot.

• Nonsingular matrix

A square matrix with nonzero determinant

• One-to-one function

A function in which each element of the range corresponds to exactly one element in the domain

• Opens upward or downward

A parabola y = ax 2 + bx + c opens upward if a > 0 and opens downward if a < 0.

• Parameter

See Parametric equations.

• Probability of an event in a finite sample space of equally likely outcomes

The number of outcomes in the event divided by the number of outcomes in the sample space.

• Quotient identities

tan ?= sin ?cos ?and cot ?= cos ? sin ?

• Standard form: equation of a circle

(x - h)2 + (y - k2) = r 2

• Standard unit vectors

In the plane i = <1, 0> and j = <0,1>; in space i = <1,0,0>, j = <0,1,0> k = <0,0,1>

• Statistic

A number that measures a quantitative variable for a sample from a population.

• Third quartile

See Quartile.

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