Area of a circle = <span>πr^2
to find the radius we divide the diameter by 2
r = 8
</span><span>π=3
</span>
plug these values into your formula and solve
a=(3)(8)^2
a = 192m squared
Answer:
25
Step-by-step explanation:
2x+2+5x+3=180
7x=175
x=24
Answer:
128,955 rounds to 130000 i believe
Step-by-step explanation:
Since there is a common difference of one, this is an arithmetic sequence of the form a(n)=a+d(n-1) which in this case is:
a(n)=15+1(n-1)
All arithmetic sequences have a sum which is equal to the average of the first and last terms time the number of terms, mathematically:
s(n)=(2an+dn^2-dn)/2 (that is just the result of ((a+a+d(n-1))(n/2)) )
Since a=15 and d=1 this becomes:
s(n)=(30n+n^2-n)/2
s(n)=(n^2+29n)/2 so
s(10)=(100+290)/2
s(10)=195 logs
