Answer could be 2 or 20
Step-by-step explanation:
(8 + -5)6 - -5(4)
8+-5=3
6 x 3=18
-5(4)=20
Answer:
A. 13.31' to the nearest hundredth.
B. 86.52' to the nearest hundredth.
Step-by-step explanation:
Part A>
The apotherm of a regular polygon is the distance of the line segment from the centre of the polygon to the midpoint of a side.
2 radii of this decagon joined to the endpoints of a side form an isosceles triangle with equal sides = 14 cm.
The apotherm is the altitude of this triangle. The vertex of the triangle has an angle of 360 / 10 = 36 degrees and the apotherm bisects this angle.
So using trigonometry on the right triangle formed:
cos 18 = x / 14 where x is the apotherm.
x = 14 cos 18
= 13.31' (answer).
Part B.
Using trigonometry on the right triangle again:
sin 18 = x/2 / 14 (where x is the length of a side of the hexagon)
x/2 = 14 sin 18
x = 2 * 14 sin 18
= 8.652'.
As a decagon has 10 sides the perimeter = 8.652 * 10
= 86.52' to the nearest hundredth.
Answer:
![A=6.33\ cm^2](https://tex.z-dn.net/?f=A%3D6.33%5C%20cm%5E2)
Step-by-step explanation:
step 1
Find the radius of the circle
we know that
The circumference of a circle is equal to
![C=2\pi r](https://tex.z-dn.net/?f=C%3D2%5Cpi%20r)
we have
![C=\frac{28}{3.14}\ cm](https://tex.z-dn.net/?f=C%3D%5Cfrac%7B28%7D%7B3.14%7D%5C%20cm)
![\pi=3.14](https://tex.z-dn.net/?f=%5Cpi%3D3.14)
substitute the values
![\frac{28}{3.14}=2(3.14)r](https://tex.z-dn.net/?f=%5Cfrac%7B28%7D%7B3.14%7D%3D2%283.14%29r)
![r=\frac{28}{19.7192}\ cm](https://tex.z-dn.net/?f=r%3D%5Cfrac%7B28%7D%7B19.7192%7D%5C%20cm)
![r=1.42\ cm](https://tex.z-dn.net/?f=r%3D1.42%5C%20cm)
step 2
Find the area of the circle
The area of the circle is equal to
![A=\pi r^{2}](https://tex.z-dn.net/?f=A%3D%5Cpi%20r%5E%7B2%7D)
substitute the values
![A=(3.14)(1.42)^{2}](https://tex.z-dn.net/?f=A%3D%283.14%29%281.42%29%5E%7B2%7D)
![A=6.33\ cm^2](https://tex.z-dn.net/?f=A%3D6.33%5C%20cm%5E2)
19 * -10 = -190
but weight is always positive so it would equal 190N
Answer: Interest rate = 0.065
Step-by-step explanation:
I=PRT
3250=5000r*10
Divide by 10 on both sides
325=5000r
r=0.065