It took mark 6 hours to drive from his college to his home. the next week he drove the same distance from his home back to his college in 5 hours. if the average rate for his first trip was r miles per hour, what was the average rate for the second trip, in terms of r ?

We need to use the following formula of distance .

Distance= speed * time .

For the first time

distance = 6r

And let the average rate for the second time be s

So distance = 5s

Since distance remains same, so we get

6r=5s

Now we have to solve for s. And for that we need to get rid of 5, by dividing both sides by 5, that is

And that's the required average rate for the second trip .

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.