91Ó°ÊÓ

Give a \(\mathrm{C}++\) statement that will increase the value of the variable length by \(8.3 .\) The variable length is of type double.

Give an output statement that will produce the following message on the screen: The answer to the question of Life, the Universe, and Everything is 42

What statements should you include in your program to ensure that, when a number of type double is output, it will be output in ordinary notation with three digits after the decimal point?

Write a complete \(\mathrm{C}_{++}\) program that reads two whole numbers into two variables of type \(i n t,\) and then outputs both the whole number part and the remainder when the first number is divided by the second. This can be done using the operators / and \(\%\)

Consider the quadratic expression \\[ x^{2}-4 x+3 \\] Describing where this quadratic is negative involves describing a set of numbers that are simultaneously greater than the smaller root (+1) and less than the larger root \((+3) .\) Write a \(\mathrm{C}++\) Boolean expression that is true when the value of this quadratic is negative.

Write a complete \(C++\) program that asks the user for a number of gallons and then outputs the equivalent number of liters. There are 3.78533 liters in a gallon. Use a declared constant. since this is just an exercise, you need not have any comments in your program.