Ayuda ; -;
necesito ayuda para saber la reapuesta de el problema mostrado, si se llegase a responder hacerlo con procedimiento por favor : ^

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4? r^2. write your answer in scientific notation.