The human body is 65% oxygen by mass. if a person has a mass of 75.0 kg, what is the mass oxygen in his body?

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right