After t sec. a ball tossed in the air from ground level reaches a height of h feet given by the equation: h=144t-16t^2
a. what is the height of the ball after 3 sec.? 288 ft.
b. what is the maximum height the ball will reach
c. find the number of seconds the ball is in the air when it reaches 224 ft in height
d. after how many sec. will the ball hit the ground before rebound?
i am not sure which equation to use and why for the b, c,and d. if i find the ft/sec. that the ball travels (96), and set the quadratic equation to -16t^2+144t+288 or 16t^2-144t-288=0, is this correct? or should i use the quad formula and why.

c

step-by-step explanation:

it would be see because your formula is f(x)=6x, so 6 times 1 is 6 and you go on and the best answer is c.

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.