Nydia flips affair quarter twice. what is the probability that the coin will land on heads both times

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

How can (square root of 25) ^2 be rewritten?

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?