Answer asap , will mark brainliest
complete the reasons

given: ⃗ bisects ∠ ⃗ bisects ∠
prove: △dac ≅ △bac

statement v reason v
1. ab ⃗ bisects ∠dab 1.
2. ∠dac ≅ ∠bac 2.
3. ∠ac ≅ ∠ac 3.
4. ba ⃗ bisects ∠dcb 4.
5. ∠dac ≅ ∠bca 5.
6. △dac ≅ △bac 6.

( a line goes through the middle of a horizontal diamond. on the left, the vertex of the triangle is b, the bottom left base angle is a, the bottom right base angle is c. on the right, the vertex of the triangle is d.)

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

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?