Find the GCF of the two numbers, and rewrite the sum of the two numbers using the distributive property. 3 + 15

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.