Question 1 the graph shows the location of jacob's, kent's, and hakim's houses. each unit on the graph represents 1 kilometer.
hakim is preparing for a cross country meet. hakim is going to run from his house to jacob's, then to kent's, and finally back home. how many total kilometers did hakim run? round your answer to the nearest whole kilometer.
6 km
14 km
18 km
22 km
question 2(multiple choice worth 4 points)
what is the distance between a and b? round your answer to the nearest hundredth.
9.58 units
10.63 units
11.56 units
12.29 units
question 3(multiple choice worth 4 points)
what is the exact distance from (−1, 4) to (6, −2)?
units
units
units
units
question 4(multiple choice worth 4 points)
what is the distance from (−3, 1) to (−1, 5)? round your answer to the nearest hundredth.
3.60 units
4.12 units
4.47 units
5.66 units
question 5(multiple choice worth 4 points)
what is the length of segment bc?
4 units
5 units
6 units
7 units
first pic is for question 5 2nd pic is for question 2 last pic is for question 1

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?