in python

Coding Exercise: Tasty Typecasting

Write a program to help you feed your friends at a party by doing some math about square pizzas. Assume the grader defines a string inputStr for you, which is a decimal string meaning the side length L of the pizza in cm. The area of the pizza should be computed using the formula A = L*L. Then, assuming that each person needs to eat 100 cm² of pizza, compute the number of people it can feed, rounded down to the nearest integer. Hint

Example: if inputStr is "17.5", the area will be 306.25 cm², so 3 is the correct output.

Coding Exercise: Gravity

A parcel is thrown downward at a speed of v m/s from an airplane at altitude 11000 m. As it falls, its distance from the ground is given by the formula -4.9t² - vt + 11000, where t is the time in seconds since it was dropped. Write a program to output the time it will take to reach the ground. The input to your program is the positive floating-point number v. The required time is given by the quadratic formula