40 POINTS PLATO

Monica built a remote-controlled, toy airplane for a science project. To test the plane, she launched it from the top of a building The plane traveled a horizontal distance of 50 feet before landing on the ground. A quadratic function which models the height of the plane, in feel, relative to the grouna, at a horizontal distance of x feet from the butiding is shown.

Since the domain represents the airplane while it was in the air, the value of the domain should be restricted to the interval(,)

Space 1

A. the maximum height of

B. the horizontal distance covered by

C. all the heights in the trajectory of

Space 2

A.-10

B.125

C. negative infinity

D.0

Space 3

A. Infinity

B.50

C.125

D.225

1.) B.

the horizontal distance covered by 

2.). D (0)

3.) A ( infinity )

Step-by-step explanation:

1.) Since it is a quadratic function which models the height of the plane, in feet, relative to the ground, at a horizontal distance of x feet. Therefore,

The range = height

The domain = distance covered

2.) Since she launched it from the top of a building. That is, from a starting point, then domain = 0

3.) Since the plane traveled a horizontal distance of 50 feet before landing on the ground. This mean that it can travel further. Therefore the domain can be to infinity

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.