-36x^2 /42x^2 simplified

Which is the graph of the function y=2(4)^x

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min if they did not stop driving, how many miles could kyle and elijah drive in a whole day? ? 1 day = 24 hours. plzzz i will give you 100 points

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi