You are starting a study program to get ready for the SAT's. The first day you spend 40 minutes studying. You will increase your time studying by 3 minutes each day. Write an equation for T(d), the time in minutes, that you spend studying on day d.

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?

The area of square garden is 300m squared. how long is the diagonal?

Having a hard time understanding this question (see attachment).