Question

coding
variables - used to store, reference and manipulate information in a computer program
comments- used to describe the purpose of a section of code
input - programs can be designed to accept and utilize user inputs
computer programs are helpful for performing repeated calculations
ex. 4 - examine the blocks of code. determine the output.
a)
set side_length = 5
set perimeter = 4*side_length
print perimeter
output:

b)
set n = 17.25
set c = n² + 5*n - 6
set c_rounded to c rounded to one decimal place.
print c_rounded

Explanation:

Part (a)

Step1: Identify side_length

The variable \( \text{side\_length} \) is set to 5.

Step2: Calculate perimeter

The formula for the perimeter (assuming a square, since perimeter \( = 4\times \text{side\_length} \)) is used. So, \( \text{perimeter} = 4\times 5 = 20 \).

Step3: Print perimeter

The program prints the value of perimeter, which is 20.

Step1: Identify the value of \( n \)

The variable \( n \) is set to 17.25.

Step2: Calculate \( C \)

Using the formula \( C = n^2 + 5n - 6 \), substitute \( n = 17.25 \):
\[

$$\begin{align*} n^2&=(17.25)^2 = 297.5625\\ 5n&=5\times17.25 = 86.25\\ C&=297.5625 + 86.25 - 6\\ &=297.5625 + 80.25\\ &=377.8125 \end{align*}$$

\]

Step3: Round \( C \) to one decimal place

Rounding 377.8125 to one decimal place gives 377.8 (since the second decimal digit is 1, which is less than 5, we round down the first decimal digit).

Step4: Print \( C\_rounded \)

The program prints the rounded value, which is 377.8.

Answer:

20

Part (b)