Aculture starts with 4000 bacteria after 5 hours it has 4800 how many bacteria after 15 hours

6400

Step-by-step explanation:

so every 5 hours it gains 800 bacteria so 4800+800=5600 (hour 10)

and 5600+800=6400 (hour 15)

28000

Step-by-step explanation:it gains 8000 bacteria every 5 hours and there are 3 fives in fifteen times 8000*3=24000 then add 4000

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

the lateral surface area of a sphere is 2πrh where h=2r.

then:

surface area = 4πr^2.

in this case, r=8 units ⇒ surface area = 4π(8 units)^2. = 256π sq. units!

then, the surface area of the sphere shown in the image is: 256π sq. units!