Han earns33.00 for babysitting4 hours at this rate how much will he earn if he babysitters for 7 hours

Nick estimated that 5/8+4/7 is about 2.explain how you know his estimate is not reasonable plz and fast i will give 50 points

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle