Danny and three friends went to the football game friday night. it cost them $5 each to get into the game. while at the game the four together had two orders of nachos ($2.50 each) four large colas ($1.50 each) four candy bars ($0.75 each) and two bags of popcorn ($1 each). at the end of the evening, they split the $20 gasoline bill.
1. how much did each one spend friday night? show or explain how you got your answer.
2. how much would each have spent if only three of them split the gasoline bill? show or explain how you got your answer.

Anyone know? will mark brainliest if correct

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

Can you me find the missing length. i attached an image.