Mikayla designed a survey to determine the number of people expected at opening night of a community theater. The community
has about 5,000 members. She selected a sample of the first 25 parents dropping off actors during theater rehearsal. Which best
explains Mikayla's sample?
O
random and biased
random and unbiased
nonrandom and biased
nonrandom and unbiased

Anyone know? will mark brainliest if you're 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

When a rectangle is dilated, how do the perimeter and area of the rectangle change?