The population of bacteria in a petri dish doubles every 40 seconds. The population of the bacteria is initially 400 organisms. What unit is most appropriate for the time at which the number of bacteria is 300?

a. hour

b. bacteria per hour

c. Second

d. bacteria per second

hey there!

if she's saving for six months, let's divide the total number we need for the trip by six, dividing it into the amount that needs to be saved for each month.

500 ÷ 6 =

she needs to save at least this amount each month, so we should use this symbol: ≥

let x be the amount she saves each month.

your final answer is x ≥

hope this !

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.