4jillian's school is selling tickets for a play. the tickets cost $10.50 for adults and $3.75 for students. the ticket salesfor opening night totaled $2071.50. the equation 10.50a 3.75b 2071.50, where a is the number of adult ticketsa sold and b is the number of student tickets sold, can be used to find the number of adult and student tickets. if 82students attended, how may adult tickets were sold? adult tickets

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

Acircle has a circumference of 7.850 units. what is its radius?

You buy five cds at a sale for $5.95 each. write an expression for the total cost of the cds.then use the distributive property and mental math to evaluate the expression.