Convert 9,78 h to hours, minutes and seconds​

What is the approximate circumference of the circle shown below?

Plz a. s. a. p.the table shows the number of male and female contestants who did not win a prize. what is the probability that a randomly selected contestant won a prize, given that the contestant was female? write the probability as a percent. round to the neares tenth, if needed.

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way