.4 and .40 are indeed the same amount.
We usually drop the 0 in the 100'ths place when it is not necessary for indicating money or solving a problem with 2 decimals.
Also realize that .400 .4000 etc are all the same as well.
Answer:
x1=5/2+i
x2=5/2-i
Step-by-step explanation:
x^2-5x+7=0
a=1, b=-5, c=7
x1=(-b+sqrt(b^2-4ac))/2a
x1=(-(-5)+sqrt(5^2 - 4*1*7))/2
x1=(5+sqrt(25-28))/2
x1=(5+sqrt(-4))/2
x1=(5+sqrt(4i^2))/2
x1=(5+2i)/2
x1=5/2+i
x2=(-b-sqrt(b^2-4ac))/2a
x2=(5-2i)/2
x2=5/2-iw
9514 1404 393
Answer:
24 cm^2
Step-by-step explanation:
The base of ∆Z is 4 cm, and its height is 12 cm. The area is given by the formula ...
A = 1/2bh
A = 1/2(4 cm)(12 cm) = 24 cm^2 . . . area of Z
First, lets just write down what we are given,
R of cone = R of cylinder / 2
H of cone = R of cylinder
Volume of a cone = pi*r^2*h/3
All we are asked is to show what the volume of the cone is with only the variable of r which is the radius of the cylinder( I'm guessing ). So,
pi*(r/2)^2*r/3
Answer:
base edge? height?
Surface area of a square pyramid:
s = length of base edge.
h = height of pyramid from base to top.
A = surface area.
![A \: = s² + 2s \sqrt{\frac{a^{2}}{4}+h^{2}}](https://tex.z-dn.net/?f=%20A%20%5C%3A%20%3D%20s%C2%B2%20%2B%202s%20%5Csqrt%7B%5Cfrac%7Ba%5E%7B2%7D%7D%7B4%7D%2Bh%5E%7B2%7D%7D)
√ = square root, root of 2, opposite of square.
² = square, power of 2, times itself once.
√n × √n = n
n × n = n²