The surface area of a sphere is
where r is the radius;
The circumference is
so that
using this value we can evaluate the surface area of 1 ball as:
For 100 ball you get:
The more fuel efficient car is the car that has 28 miles to a gallen.She would be saving 752 dollars.
Answer:
mean = 12.9
median = 9.5
Step-by-step explanation:
mean = sum of all observations / total no. of observations
= 7+9+10+6+8+12+5+11+48+13 / 10
=129 / 10
= 12.9
median = middlemost no. after arranging in ascending order
= 5,6,7,8,9,10,11,13,48
=9 and 10
=9+10 / 2
= 19 / 2
= 9.5
Answer:
Ok, the rules of the exponent come from a logic construction.
If we have x^n
this means that n is multiplied by itself n times.
If we decompose n into a + b, we have:
x by itself a times, and then x by itself b times, and for how the product works, this is equivalent:
if n = 5, a= 2 and b = 3
x^5 = (x*x*x*x*x) 5 times-
x^5 = x^(2 + 3) = (x^2)*(x^3) = (x*x*)*(x*x*x) = x*x*x*x*x = x^5
And the same for the other rules:
(x^n)^b = x^n*b and such.
Obviusly, this only works when we have a common base.
So the correct answer is that we constructed the exponential rules in a way that only can be used when we have a common base, and this happens because to construct them, we started with common bases.
