A pebble dropped in a pond makes ripples in concentric circles. The radius of one of those circles is increasing at a rate of 4 in/sec. Find the rate of change of the area within that circle when the radius is 8 in.

Danny draws a transversal, t, on two parallel lines ab and cd, as shown below: he makes the following table to prove that the alternate interior angles are equal: which is the missing justification? (6 points) corresponding angles formed by a transversal on parallel lines are supplementary. corresponding angles formed by a transversal on parallel lines are congruent. co-interior angles formed by a transversal on parallel lines are congruent. co-exterior angles formed by a transversal on parallel lines are congruent.

How many $20 bills do you need to have to make $280

What is the value of x in the following equation? -3x-2=2x+8