Look at question #8. q: about how many songs can he download in 2 hours

We are told that 1,024 kilobytes (kB) is equal to 1 megabyte (MB).

We are also told that Timothy's computer downloads at a rate of 256 kB per second. So let's convert this to MB:

So now we know Timothy's download rate is 0.25 MB per second.

We know there are 60 seconds in a minute, so to find how many MB can be downloaded in a minute, we must multiply by 60:

So in 1 minute, Timothy can download 15 MB worth of songs. But to find the amount in 1 hour, we must multiply by 60 again:

So in 1 hour, Timothy can download 900 MB worth of songs. However the question asks for two hours; so we multiply by 2:

In 2 hours, Timothy can download 1,800 MB worth of songs. We are told a typical song is 4 MB, so let's divide by 4:

So now we know that Timothy can download B) 450 songs in 2 hours.

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation: