Write a C program to accept a coordinate point in an XY coordinate system and determine in which quadrant the coordinate point lies.

Write a C++ program to compute the surface-area of a cylinder, given the radius (R) and the height (H). The program must ask the user to enter R and H. It then prints the surface-area with a proper message in the main program. Define a function to compute the surface-area and let main() call it. Clearly show the function prototype. This function takes the radius R and height H as parameters and returns the surface area. The formula for computing the surface-area of a cylinder is 2πR(H + R), where ? = 3.141   Write a function called isValidLength that takes an integer number and returns true if the number has a valid length and false otherwise. Valid- length is determined by finding number length. If the length is at least 3 digits and at most 5 digits, then the number has a valid length. For example, the number 324 is valid because it's 3 digits long and the number 22 is invalid because it’s 2 digits long.   Write a function called isValidDigits that takes an integer…

Write a basic function that takes an input mass (any units) and returns the mass in solar masses. (in python)

write a simple python code for vectors: