Can someone please help me out here?
Please answer all the questions :D thank u in advance!

(1st picture attached shows the graph u need 2 use 2 answer these questions )
Here's the questions:

1. When comparing the "# of Bacteria" each hour, what is the number being multiplied by each time? (growth/decay factor) *
A.1
B.8
C.32
D.224

2.What is the initial number of bacteria? (at time zero) *
A.0
B.1
C.4
D.32

3. Write a rule/ equation for this picture:
(2nd attachment)
A. y = 4 * 8^x
B. y = 4 + 8x
C. y = 4^x + 8
D. y = 4x + 8

4.Suppose you started with 100 bacteria, but they still grew by the same growth factor. Write the new function rule for this situation.

A. y = 4 + 8x
B. y = 100x + 8
C. y = 100
D. y = 100 * 8^x

Also, I'm home schooled and really need friends so if ur interested fell free 2 hmu :))

Submarines control how much they float or sink in the ocean by changing the volume of air and water contained in large ballast tanks. when the tanks are completely full of water, the submarine increases its overall mass and sinks down to the bottom. when the tanks are completely full of air, the submarine reduces its overall mass and floats to the surface. depending on the density of the seawater surrounding the submarine, it will pump seawater in or out of the tanks in order to achieve the same overall density as the sea water and float neutrally in the water. the volume of the submarine never changes. when the tanks are completely full of water, a submarine with a volume of 7.8\times10^3\text{ m}^37.8×10 3 m 3 7, point, 8, times, 10, start superscript, 3, end superscript, space, m, start superscript, 3, end superscript has a total mass of 8\times10^6\text{ kg}8×10 6 kg8, times, 10, start superscript, 6, end superscript, space, k, g. the density of the seawater is 10^3\text{ kg/m}^310 3 kg/m 3 10, start superscript, 3, end superscript, space, k, g, slash, m, start superscript, 3, end superscript. to make that submarine float neutrally, and neither float nor sink in the ocean, what volume of water does that submarine need to subtract from its tanks?