The formula for finding the surface area of a sphere is A=4π
. Since we already have the radius, we just plug that into the equation, like so:
A = 4 x 3.14 x 
First, following the rules of PEMDAS, do the exponent, coming out with an answer of 1. Now, multiply 4 x 3.14, which is 12.56. 12.56 x 1 = 12.56.
Rounded to the nearest tenth, your answer is
12.6.
Hope this helps!
Answer:
The first one is 0 and the second one is 12 so that is false
Step-by-step explanation:
Answer:
The complete set of roots is 5, -3, –4 + i, –4 – i
Step-by-step explanation:
The given polynomial is
We equate to zero to get:
This implies that:
x+3=0,or x-5=0 or 
x=-3,or x=5
For , we use the quadratic formula to get;
where a=1,b=8,c=17
or 
The complete solution is 5, -3, –4 + i, –4 – i
First we find the mean (average)
(90 + 82 + 88 + 78 + 93) / 5 = 431/5 = 86.2
now we find the absolute value of the difference of the data points and the mean
90 - 86.2 = 3.8....| 3.8 | = 3.8
82 - 86.2 = -4.2...| -4.2 | = 4.2
88 - 86.2 = 1.8....| 1.8 | = 1.8
78 - 86.2 = -8.2 | -8.2| = 8.2
93 - 86.2 = 6.8....| 6.8| = 6.8
now we find the mean (average) of those values
(3.8 + 4.2 + 1.8 + 8.2 + 6.8) / 5 = 24.8 / 5 = 4.96 <== the MAD
1. 25% of 8$ is 2$, so dividing 16 and 2, it takes 8 weeks for 16 dollars
2. 400 is 80% of what number?, y=400x100/80
Y= 500
