The table below shows the distance d(t) in meters that an object travels in t seconds: t (seconds): 1, 2, 3, 4 d(t)(meters): 15, 60, 135, 240 what is the average rate of change of d(t) between 2 seconds and 4 seconds, and what does it represent? a. 50 m/s; it represents the average speed of the object between 2 seconds and 4 seconds b. 90 m/s; it represents the average speed of the object between 2 seconds and 4 seconds c. 90 m/s; it represents the average distance traveled by the object between 2 seconds and 4 seconds d. 50 m/s; it represents the average distance traveled by the object between 2 seconds and 6 seconds

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

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.