You would need 105 of sodium I found how much increase there was from 30 to 75 by doing 75/30 which is 2.5 that means the new amount of sodium would be 2.5 times 42 which is 105. You could also set up ratios and cross multiply like the picture I sent
Answer:
multiply 15 by 6 and you will get the area of the garage. multiply that by 8 and you will get the cost
I cannot see a pictureesss
The period of the function is 2pi
These are the steps good luck