Hiro painted his room at a rate of 8 square meters per hour. after 3 hours of painting, he had 28 square meters left to paint. let a(t) denote the area to paint a (measured in square meters) as a function of time t (measured in hours).

Step-by-step explanation:

The  equation of the line in Slope-Intercept form is:

Where "m" is the slope and "b" is the y-intercept.

According to the data given in the exercise, you know that:

- represents the area to paint the Hiros' romm as a function of time.

- The rate he painted the room was 8 square meters per hour.

- The area left to paint after 3 hours was 28 m².

Therefore, based on this, you can idenfity that:

1. The slope of the line is:

2. One of the point on the line is:

So you must substitute the slope and the coordinates of that point into and then solve for "b" in order to find its value:

Therefore, you can determine that the function is:

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

susie has 7 apples