What is the surface area of a sphere with a radius of 20 m?
1,600π m2
800π m2
400π m2
200π m2

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

Does the construction demonstrate how to copy an angle correctly using technology a) yes the distance between points a and f was used to create circle h b) yes the distance between points f and g was used to create circle h c) no the distance between points a and f was used to create circle h d) no the distance between points f and g was used to create circle h