1. Write the standard equation of the circle.
Center (0,3); r = 7
A) X^2 + (y-3)^2 = 7
B) X^2 + (y-3)^2 = 49
C) (X-3)^2 + y^2 = 7
D) (X-3)^2 + y^2 = 49

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?

The length of an intercepted arc of a central angle of a circle is 4 cm. if the radius of the circle is 5 cm what is the measurement of the central angle to the nearest whole degree