What is the area of the shape ( 1/4 circle with a radius of 10 )

There are 12 boy and13 girls in a class. if the teacher randomly chooses a student’s name out of a hat what is the probability it will be a girl

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

What is the explicit rule for the sequence in simplified form? −1,−4,−7,−10,−13… an=4−5n an=−4−3n an=2−3n an=−6−5n