Answer:
$840
Step-by-step explanation:
4 weeks = 28 days
28 x 30 = 840
Answer:
When X=Y every number on either side is the same, for example 1(X)=1(Y)
Step-by-step explanation:
This is because when X=Y the X value isn't altered in any way to equal Y, so they are the same number, hope this helped!
Answer:
26 rows · An inch is a unit of length equal to exactly 2.54 centimeters. There are 12 inches in a foot, and 36 inches in a yard. There are 12 inches in a foot, and 36 inches in a yard. Feet to Inches Conversions
Step-by-step explanation:
Answer:
925
Step-by-step explanation:
In order to solve this summation formula, you need to first understand what it means. The summation symbol is tell you to add the terms in a sequence. Below the summation sign, there is a variable and number; the variable n is the index of summation and the number 1 is the lower limit of summation or the first value of the sequence. The number 25 above the summation sign is the upper limit (so there would be 25 terms, with the first being 1). The polynomial to the right of the summation symbol represents the explicit function for each term. For example, using this, the first term would be (3(1) - 2) and the second (3(2) - 2) and so on. This means the value of that equation is:
(3(1) - 2) + (3(2) - 2) + (3(3) - 2)... + (3(25) - 2)
One way to solve this is to write all 25 of the terms and add them, but since that's tedious, you can solve this by first doing the basic summation of 1 to 25 and then inputting that into the equation:
1 + 2 + 3... + 25 = (25 × 26)/2 (when the first number is one and the rate of change is 1, the sum of the terms in a sequence is (n*(n+1))/2)
= 325
Now, that you know what the sum of the sequence of terms 1 to 25 are, you can multiply this by the constant since if you break up the equation you would be multiplying 3 by 1 then 3 by 2 and so on until 25, or 3 × (1 + 2 + 3... + 25):
3 × 325 = 975
At this point, you just need to add (-2) × 25. You do this because since there are 25 terms, if you subtracted 2 each time, you would subtract 2 twenty-five times:
975 + ((-2) × 25)
= 975 - 50
= 925
Let's analyze each answer:
The atmospheric pressure is lower at 15 miles above sea level than at 10 miles above sea level. --> true
In fact, we see that the pressure at 15 miles above sea level is less than 1 pound per square inch, while the pressure at 10 miles above sea level is almost 2 pound per square inch.
As the altitude increases, the atmospheric pressure increases. --> false
It's actually the opposite: from the graph, we see that as the altitude increases (going towards right on the graph), the pressure decreases.
The atmospheric pressure is 14 pounds per square inch at sea level. --> true
If we take altitude=0, we see that the value of the pressure is 14 pounds per square inch.
As the altitude approaches sea level, the atmospheric pressure increases. --> true
As the altitude approaches sea level (so, going towards left in the graph), we see that the value of the pressure increases.
The atmospheric pressure gets close to 14 pounds per square foot as the altitude continues to increase. --> false
The pressure is 14 pounds per square inch only when the altitude is 0 miles above sea level.
