Construct a linear equation with a rate of change of 2/3 and an initial value of 4.

Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?