An industrial factory make 2 ¾ yards of chain every minute. The cost of each yard of chain is $4.56. What is the total cost for all chain produced in 20 minutes? A. $12.54
B. $55.00
C. $250.80
D. $136.80

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Julie was able to walk 16 km through the zoo in 6 hours. how long will it take her to walk 24 km through the zoo?