Researchers recorded that a certain bacteria population declined from 120,000 to 200 in 36 hours. At this rate of decay, how many bacteria will there be in 31 hours? Round to the nearest whole number.

There will 486 bacteria in 31 hours.

Step-by-step explanation:

The population decay in bacteria is exponential.

Exponential function : , where A = initial population, b multiplication decay factor, t= time:

As per given:

Initial population:

After 36 hours, population =

Divide both sides by 120,000 we get

Taking natural log on both sides , we get

At x= 31,

Hence, there will 486 bacteria in 31 hours.

three-fourths of an hour

36÷48=0.75

0.75=

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.