In ideal conditions 200 colony forming units (cfu) of e. Coli can grow to 400 cfu in 20 minutes to 800 cfu in 40 minutes and to 1600 cfu in an hour. Write an equation that models the function

f (x) = ax + b and g (x) = x-4, where a and b are constant. If fg (4) = 2 and gf (2) = 4, find the values of a and b.

What is 9.33 in fraction form

Sketch one cycle of the cosine function. y = 2 cos 2 theta

A cube has a surface area of 96 sq. in. What is the length of its side?

Tera is training for a bicycle race. Each week she rides a total distance greater then 10 kilometers and less than or equal to 30 kilometers.

A right triangle has legs that are 19 in. and 23 in. What is the area of the triangle

What equation results from completing the square and then factoring x2+4x=12

In two years the value of a car chnaged from 14,000 to 11,200 what is the percent of change

What is the difference 4 1/3 - (-2/3)

Elaine is painting a fence. she knows that she needs 1 gallon of paint for each 10 feet of fencing. The fencing will enclose a rectangular yard that is 3 yards long and 2 yards wide. how much paint does Elaine need?