Answer:
B. 31.4
Step-by-step explanation:
● you use the equation to find the circumstance of a circle so 2(pi)r.
● plug in the numbers into the equation 2(3.14)(5)
● evaluate. 2(15.70) = 31.4
Let the number be 'x'
Since, the product of number and 4 less than twice that number is 336.
![x \times [(2 \times x) -4] = 336](https://tex.z-dn.net/?f=x%20%5Ctimes%20%5B%282%20%5Ctimes%20x%29%20-4%5D%20%3D%20336)
![x[2x -4] = 336](https://tex.z-dn.net/?f=x%5B2x%20-4%5D%20%3D%20336)
Now, we will split the middle term, we get
So, 
So, x = 14 or x = -12
Therefore, the negative number is '-12'.
Answer:
(-5)+(-4)= -9
(-3)+(+1)= -2
(-2)+(-7)= -9
Step-by-step explanation:
Answer:
Mean = 528 ppm
Standard deviation = 90.8 ppm
Step-by-step explanation:
Assuming a basis of 100 trees
6 trees with 350 ppm (minimal growth)
10 trees with 450 ppm (slow growth)
47 trees with 550 ppm (moderate growth)
37 trees with 650 ppm (rapid growth)
Mean = xbar = Σx/N
x = each variable
xbar = mean
N = number of variables = 100
Σx = sum of all variables = sum of all the ppm = (6×350) + (10×450) + (47×550) + (37×550) = 52800
xbar = 52800/100 = 528 ppm
Standard deviation = σ = √[Σ(x - xbar)²/N]
x = each variable
xbar = mean = 528
N = number of variables = 12
Σ(x - xbar)² = [6(350 - 528)²] + [10(450 - 528)²] + [47(550 - 528)²] + [37(650 - 528)²] = 824400
σ = √[Σ(x - xbar)²/N] = √(824400/100) = 90.8 ppm
Step-by-step explanation:
Volume is calculated by finding out the product of length, width and height so
the correct option is B.
B. The volume is the product of the area of the base, 3x(3x + 4) and the height, 3x - 1.
Hope it will help :)
