Which description is paired with its correct expression? two less than the quotient of a number cubed and four, increased by eight;
2 - n3/4 + 8

six times the difference of five and a number squared;
6(n2 - 5)

three more than the quotient of nine and a number cubed, decreased by two;
3 + 9/n3 - 2

twice the difference of a number squared and three;
2n3 - 3

Thanks for points if you need help ask your teacher

 1) D

2) C

Step-by-step explanation:

1. The blue algae has an initial mass of 20 kg and doubles its mass every hour. Then after t hours, the mass of blue algae is

2. The green algae has an initial mass of 160 kg and grows at a constant rate of 0.20 kg per minute. Then after t hours (60t minutes), the mass of green algae is

Part I) At t=3:

The mass of green algae has 196-160=36 kg more mass at 3 hours.

Part II) At t=4:

The blue algae has 320-208=112 kg more mass at 4 hours.