30 POINTS PLEASE SOLVE please explain step by step 1. solve the following PROBLEM (meaning #1 ) using the order of operations A. Expression 1 solve- 3^4-(9+ 6)⋅5+4^0 B. Expression 2 solve- 5^2+ 4⋅(2+6)-2⋅2-1 2. The average distance from the sun to the planet Mercury is about 60,000,000 km. The diameter of a human hair is about 0.0025 cm. (a) What is the distance from the sun to Mercury written in scientific notation? (b) What is the diameter of a human hair written in scientific notation? (c) Bonus Question – To subtract the measurements in Parts (a) and (b), what do you have to do first? 3. The population of Columbus, Ohio, in 2014 was about 825,000. The population of the United States was about 320 million in 2014. (a) Write each population in scientific notation. Columbus, Ohio: The United States: (b) About how many times larger was the population of the United States than the population of Columbus, Ohio? Show your work!

Ok so first we solve the whole problem bye using PEMDAS= PARENTHESES, EXPONETS, MULTIPLICATION, DIVISION, ADDITION AND SUBTRACTING. So we start with the (9+6) = 15 then the 3^4 =12 then multiply 15x5=75 then add the 4 to the 75=79 then get the 12 and sub the 79-12= 63 is the answer for a now for b

So Get the (2+6) =8 then 5^2=10 then4x8=32 now 2x2= 4 then 10+32=42 - 4=38-1=37 is the answer

Hopefully i helped I would appreciate if I get brainliest!