Arithmetic, Largest Value and Smallest Value) Write a program that inputs three different integers from the keyboard, then prints the sum, the average, the product, the smallest and the largest of these numbers. Use only the single-selection form of the if statement you learned in this chapter. The screen dialogue should appear as follows:

Enter three different integers: 13 27 14
Sum is 54
Average is 18
Product is 4914
Smallest is 13
Largest is 27

A multiple-choice test contains 10 questions. There are four possible answers for each question. a) In how many ways can a student answer the questions on the test if the student answers every question? b) In how many ways can a student answer the questions on the test if the student can leave answers blank?

(Printing Values with printf) Write a program that prints the numbers 1 to 4 on the same line. Write the program using the following methods.

• a) Using one printf statement with no conversion specifiers.
• b) Using one printf statement with four conversion specifiers.
• c) Using four printf statements.

(Arithmetic) Write a program that asks the user to enter two numbers, obtains them from the user and prints their sum, product, difference, quotient and remainder.

State the order of evaluation of the operators in each of the following C statements and show the value of x after each statement is performed.

• a) x = 7 + 3 * 6 / 2 - 1;
• b) x = 2 % 2 + 2 * 2 - 2 / 2;
• c) x = ( 3 * 9 * ( 3 + ( 9 * 3 / ( 3 ) ) ) );

Given the equation y = ax3 + 7, which of the following, if any, are correct C statements for this equation?

• a) y = a * x * x * x + 7;
• b) y = a * x * x * ( x + 7 );
• c) y = ( a * x ) * x * ( x + 7 );
• d) y = ( a * x ) * x * x + 7;
• e) y = a * ( x * x * x ) + 7;
• f) y = a * x * ( x * x + 7 );

Which, if any, of the following C statements contain variables whose values are replaced?

• a) scanf( "%d%d%d%d%d", &b, &c, &d, &e, &f );
• b) p = i + j + k + 7;
• c) printf( "Values are replaced" );
• d) printf( "a = 5" );

What, if anything, prints when each of the following statements is performed? If nothing prints, then answer “Nothing.” Assume x = 2 and y = 3.

• a) printf( "%d", x );
• b) printf( "%d", x + x );
• c) printf( "x=" );
• d) printf( "x=%d", x );
• e) printf( "%d = %d", x + y, y + x );
• f) z = x + y;
• g) scanf( "%d%d", &x, &y );
• h) // printf( "x + y = %d", x + y );
• i) printf( "\n" );

Fill in the blanks in each of the following:

• a) What arithmetic operations are on the same level of precedence as multiplication? .
• b) When parentheses are nested, which set of parentheses is evaluated first in an arithmetic expression? .
• c) A location in the computer’s memory that may contain different values at various times throughout the execution of a program is called a .

State which of the following are true and which are false. If false, explain your answer.

• a) C operators are evaluated from left to right.
• ) The following are all valid variable names: under_bar, m928134, t5, j7, her_sales, his_account_total, a, b, c, z, z2.
• c) The statement printf("a = 5;"); is a typical example of an assignment statement.
• d) A valid arithmetic expression containing no parentheses is evaluated from left to right.
• e) The following are all invalid variable names: 3g, 87, 67h2, h22, 2h.

The Sad State Lottery requires you to select a sequence of three different numbers from 0 through 49. (Order is important.) You are a winner if your sequence agrees with that in the drawing, and you are a booby prize winner if your selection of numbers is correct, but in the wrong order. What is the probability of being a winner? What is the probability of being a booby prize winner? What is the probability that you are either a winner or a booby prize winner?

Use the table below to answer. Which word best describes the dissociation of acid solution Z? A. complete B. partial C. none D. exactly 50%

$$\begin{matrix} \text{Acid Selection Data}\\ \text{Solution} & \text{pH} & \text{Dissociation}\\ \text{W} & \text{7} & \text{name}\\ \text{X} & \text{2} & \text{complete}\\ \text{Y} & \text{6} & \text{partial}\\ \text{Z} & \text{4} & \text{??}\\ \end{matrix}$$

Harbor seals, like many animals, determine the direction from 30 which a sound is coming by sensing the difference in arrival times at their two ears. A small difference in arrival times means that the object is in front of the seal; a larger difference means it is to the left or right. There is a minimum time difference that a seal can sense, and this leads to a limitation on a seal's direction sense. Seals can distinguish between two sounds that come from directions $3^{\circ}$ apart in air, but this increases to $9^{\circ}$ in water. Explain why you would expect a seal's directional discrimination to be worse in water than in air.

Choose the best answer. The yellow perch (Perca flavescens) is a fish that breeds in spring. A single female can produce up to 40,000 eggs at one time. This species is an example of which of the key ideas of Darwin's theory of evolution by natural selection? (a) Individuals produce an excess of offspring. (b) Individuals vary in their phenotypes. (c) Phenotypic differences in individuals can be inherited. (d) Different phenotypes have different abilities to survive and reproduce.