Answer is the first choice -5π/2
An=a1+d(n-1)
a13=1.9
1.9=a1+3.7(13-1)
1.9=a1+3.7(12)
1.9=a1+44.4
minus 44.4 both sides
-42.5=a1
an=-42.5+3.7(n-1)
S_24, so sum all theway up to a24
S_n=(n(a1+an))/2
a1=-42.5
a24=-42.5+3.7(24-1)=42.6
S_n=(24(-42.5+42.6))/2
S_n=(24(0.1))/2
S_n=(2.4)/2
S_n=1.2
D
Answer:
52.36%
Step-by-step explanation:
First, you need to find the radius of the circle. You can do this by using the Pythagorean theorem, which states a^2+b^2=c^2. In this case, a and b are equal to 1.2 and 1.6, and c is the radius of the circle. Plugging in we get 1.2^2+1.6^2=c^2 or 1.44+2.56=c^2 or 4=c^2. Finding the square root of both sides of the equation, we find that 2=c. Now that we have the radius, we can find the area of the circle. The area of a circle is expressed as πr^2, and plugging in 2 for r we get an area of 4π, or ~12.56637. Now all we do is divide 12,56637 by 24 and get what percentage of the area of the triangle the circle covers, which is roughly 0.5236, or 52.36%
Answer:
8
Step-by-step explanation:
40 divided by 5 is 8
40/5=8