8. The path of a soccer ball can be modeled by the equation h -16t2 + 8t + 3, where h is the height (in feet) of the soccer ball t seconds after the ball is kicked. a. After how many seconds does the ball reach its maximum height? b. What is the maximum height of the soccer ball?​

the diameter is 16 cm. are you a teacher?

step-by-step explanation:

the answer is 13 cm

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.