Mason has a collection of 49¢ stamps, 20¢ stamps, and 34 stamps worth $23.55. he has 56 total 49¢ and 20+ stamps and the number of 3¢ stamps is nine more than the number of 20¢ stamps. how many of each does he have?

Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry

What is the definition of exponential decay?

10 points? me . its important ‼️‼️