Answer:
Hi... Your answer is... A=1
Consider the arithmetic series 
Let t=1 in the given series, we get
first term =
= 3-4 = -1.
Let t=2 in the given series, we get
second term =
= 
Let t=3 in the given series, we get
third term = 
Now, let t=18 in the given series, we get
last term = l = 
We get the series as
-1, 2, 5,..... 50
Sum = 
= 
= 
= 441
Therefore, the sum of the given arithmetic series is 441.
Answer:
it goes 1.25 km per minute
Step-by-step explanation:
7.5 divided by 6=1.25
1188 = 2 * 2 * 11 * 3 * 3 * 3
11 has only 1 factor present so 11 must be one of the things you divide by
2 * 2 = 4 is another one. In order to have a perfect cube you need 3 prime factors not just 2
So 1188 must be divided by 11 * 4 = 44
When you do that, you get 27 which is a perfect cube.
Let
t = time, hours
h = height, feet
At 1 PM, the time and height are respectively
t₁ = 1 hour
h₁ = 4400 feet
At 4 PM, the time and height are respectively
t₂ = 4 hours
h₂ = 5600 feet
By definition, the mean hourly change in elevation is

Answer: 400 feet per hour