Answer:
30 mph
Step-by-step explanation:
Let d = distance (in miles)
Let t = time (in hours)
Let v = average speed driving <u>to</u> the airport (in mph)
⇒ v + 15 = average speed driving <u>from</u> the airport (in mph)
Using: distance = speed x time

Create two equations for the journey to and from the airport, given that the distance one way is 18 miles:

We are told that the total driving time is 1 hour, so the sum of these expressions equals 1 hour:

Now all we have to do is solve the equation for v:







As v is positive, v = 30 only
So the average speed driving to the airport was 30 mph
(and the average speed driving from the airport was 45 mph)
Answer:
The correct option is B.
Step-by-step explanation:
It is given that the surface area of an oil spill gets 131% larger every day, represented by the function
Where x is number of days.
On the first day, it covered an area of 21 square meters. It means the initial area is 21 square meters.
The function is defined as
Where is initial value and b is growth factor.
It means the function of new area is the product of initial area and increasing area function. The required function is
Therefore option B is correct.
Answer:
140 degrees
Step-by-step explanation:
Just measure from point A to point F giving you 140 degrees.
Answer:
The actual perimeter of the field is 352 meters
Step-by-step explanation:
Given;
the perimeter of a field is 0.352 meters
the actual perimeter of the field is 1,000 times as large
let the perimeter of the field = p
the the actual perimeter of the field = T
Given;
P = 0.352 m
T = 1000 x p
T = 1000 x 0.352
T = 352 m
Therefore, the actual perimeter of the field is 352 meters