The graph below models the height of a remote-control helicopter over 20 seconds during fl ight. y x 10 5 15 20 (0,46) Time (seconds) H e i g h t ( f t ) (5,19) (15,14) (20,17) (10,20) 50 40 30 20 10 Over which interval does the helicopter have the slowest average rate of change?

sorry i just need to anwers this to get points

step-by-step explanation:

answer: 800

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.