Acontractor currently has 20 construction workers working on a building. when the building is finished, it will have 20 stories. if he
increases the number of workers to 40, the building will be done twice as quickly. which statement best describes the number of
construction workers in this situation?
a.
the number of construction workers is the independent variable.
b.
the number of construction workers is the constant variable.
c.
the number of construction workers is both an independent and a dependent variable.
d.
the number of construction workers is the dependent variable.

The number of construction workers is the independent variable.

Step-by-step explanation:

The time it takes to finish the building depends on how many people work on it. So, the time it takes is the dependent variable, which depends on how many people work on it, which is the independent variable.

complete the steps to find the area of the trapezoid.

area of rectangle = 256   square units

area of triangle 1 = 24  square units

area of triangle 2 = 16  square units

area of triangle 3 =   96 square units

area of trapezoid = 120  square units

step-by-step explanation:

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m