28. Mrs. Belland's science class does an experiment on bacteria. They find that the growth rate G of
bacteria can be modeled by G(t) = 8210-25 and
the death rate D is D(t) = 10.810.25, where t is
time in hours. Which function N shows the total
number of bacteria living at any one time t?
a. N(t) = 10.8+0.25 + 82+0.25
b. N(t) = 10.8+0.25 – 82+0.25
c. N(t) = 8210.25 + 10.8+0.25
d. N() = 82925 – 10.80.25

2 1/2 feet

step-by-step explanation:

8.3 and the 3 is repeating

hope this .

fabric (square meters)                   cloaks

7                                                           21

4/3                                                         4

step-by-step explanation:

we are told that harry needs 2 square meters of fabric for every 6 wizard cloaks he makes.

1. first of all we will find how many cloaks can be made from 1 square meter of fabric by dividing 6 by 2.

we can see that 3 cloaks can be made from 1 square meter of fabric. now we will multiply 3 by 7 to find number of cloaks made from 7 square meters of fabric.

therefore, harry will make 21 cloaks from 7 square meters of fabric.

2. let us find how many square meters of fabric will be needed to make 4 cloaks.

first of all we will find fabric needed for 1 cloak by dividing 2 by 6.

we can see that fabric needed for 1 cloak is   square meter. now we will multiply   by 4 to find fabric needed for 4 cloaks.

add -60 to 120 which will result in : 2x+3y=180

then subtract 2x: 3y=-2x+180

lastly, divide by 2: y= -2/3x+60

hope this is the answer you're looking for: )