accept input from the user, compute the output via a mathematical formula, and print a result using reasonable formatting. • Prompt the user for the radius of the lake. Accept the radius from the user. You are guaranteed that this radius will be an integer. You will learn how to accept numbers as input very soon. • Print out the area of the half-circular lake. A sample run might look like this: Enter the radius of the lake in meters: 9 The area of the lake is 127.2348 m^2.

write a program that prints all multiples of 5 between 5 and 50 inclusive and then reads a number from the user and prints out if it is zero, above zero, or below zero.

A thermometer is removed from a room where the temperature is 70° F and is taken outside, where the air temperature is 10° F. After one-half minute the thermometer reads 57° F. What is the reading of the thermometer at t = 1 min? Assume that the rate of change of temperature in time is proportional to the difference between the thermometer's temperature and the air temperature. Type your answer in °F in the space provided below. Round your answer to two decimal places.

Write a code to find the fifth smallest perfect number of natural numbers. A perfect number is a positive integer that is equal to the sum of its factors except for the number itself. (use a matlab)