<h2>
Hello!</h2>
The answer is:
The airplane will travel 8800 feet in 10 seconds.
<h2>Why?</h2>
It's a conversion exercise, we need to be careful in order to solve it with no mistakes.
First:
We need to remember that 1 hour is equal to 60 minutes, and 1 minute is equal to 60 seconds, so, to calculate how many seconds are in one hour, we need to perform the following operation:
Second:
We need to convert from miles to feet, we need to remember that 1 mil is equal to 5280 feet.
So, solving we have:
Now, calculating how many feet does it travel in 10 seconds, we have:
We have that the airplane will travel 8800 feet in 10 seconds.
Have a nice day!
Answer:
Only one
Step-by-step explanation:
46=3x+7 /-7
39=3x /:3
13=x
Answer: 45 ft
Explanation:
Let
x = width of the pigpen
x + 15 = length of the pigpen (since the length is 15 ft longer than the width)
Since the pigpen is enclosed in a rectangle, the total length of the fence is equal to the perimeter of the pigpen. Moreover, since the farmer can't afford more than 150 ft of fencing, the total length of the fence is less than or equal to 150 ft. So, the perimeter of the pigpen is less than or equal to 150.
Since the pigpen is rectangular
Perimeter = 2[(length) + (width)]
= 2[(x + 15) + x]
= 2(2x + 15)
Perimeter = 4x +30 (1)
Since the perimeter is less than or equal to 150, using equation (1),
4x + 30 ≤ 150
4x + 30 - 30 ≤ 150 - 30
4x ≤ 120
x ≤ 30 (divide both sides by 4)
Hence,
length = x + 15 ≤ 30 + 15 = 45
So, the length cannot be more than 45 ft. Therefore, the greatest possible length is 45 ft.
Answer:
30 min
Step-by-step explanation:
1 / ( 1/20 + 1/ x) = 12
1 = 12/20 + 12/x
8/20 = 12/x
x = 12 * 20 / 8 = 30 min
You multiply by -2 every time.