Someone me i don’t understand the circumference c=2ttr

Aformual for 8 bottles of window cleaner calls for 6 cups of rubbing to customers alcohol 2 1/4 gallons of water and 1 1/2 cups of ammonia alcohol would the forula call if a factory made 1,280 bottles for stores to sell to customers

Which of the following is true for the relation f(x)=2x^2+1

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.