You can use the sum and difference identities which for cosine is cos(a+b)= cosacosb-sinasinb
Answer: Addition
Step-by-step explanation: You can represent that as 10^5*10^-5
If you add the exponent values, you get 10^0 which is equal to 1. If you multiply them, you get 10^-25 which is wrong.
Answer:
31,564
Step-by-step explanation:
82,062 - 50,498 = 31,564
To find out how much more it rained, you subtract 1 1/4 or 1.25 and 3/5.
So you get 1.25-.6, which is .65 or 13/20 inches.
Hope this helps.