A type of mold doubles every 9 hours. If you started with 14 spores in a Petri dish, how many spores would you have after 45 hours?

70

Step-by-step explanation:

so you have 14 spores in a petri dish. every 9 hours the spores double.

45 divided by 9 equals 5

now you would do 14 times 5 which would equal 70

your answer would be 70

Happy to help! :)

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

nope.   happens to me as well.

-aparri