Skype charges a caller $.30 per minute to call a landline in cambodia. how many minutes could a caller talk if they only had $21.00 to spend?

True or false? a triangle can be circumscribed about a given circle

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?