Answer:
7.D
8.A
Step-by-step explanation:
7.
r=√((0-6)²+(0+8)²)=√(36+64)=√100=10
eq. of circle is (x-6)²+(y+8)²=10²
(x-6)²+(y+8)²=100
8.
CM=1/2CD=1/2×60=30
OM=18
OC=√(30²+18²)=√(900+324)=√(1224)=√(4×306)=√(4×9×34)=2×3√34=6√34
radius r=OC=6√34
OF=r=6√34
ON=15
FN=√((6√34)²-15²)=√(1224-225)=√999=√(9×111)=3√111
4.255 ft²
the area of the figure =
(2.25 × 1.5)+(1/8 ×3.14× 1.5²)
= 3.375 + 0.88
= 4.255 ft²
The solution is in the image
x= 11/5 OR 2.2
