9. The pressure inside a submarine increases as it dives deeper into the ocean. It exerted 25 pounds of pressure in the initial 1 m of its dive. Every metre after that, it exerted 20% more pressure than it did in the
previous metre. Use what you learned in sequences and series to solve these problems:
a) How many pounds of pressure are exerted by the submarine in the 9th metre? Round to the nearest
tenth.
(2A)

14

step-by-step explanation:

14 x 3 = 42

answer: i don't understand it

step-by-step explanation: sorry

too hard the other guy did it

step-by-step explanation:

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.