$40% 0f 20 is 8
40% × 20 = (40/100) × 20 = 8
Answer:
4/9 is the answer
Hope it correct and it helps
Answer:
435 in.²
Step-by-step explanation:
Surface area of the square pyramid = area of the square base + ½(Perimeter of base)(slant height)
Area of base = s²
s = 15 in
Area = 15² = 225 in²
Perimeter of the base = 4(15) = 60 in
Slant height = 7 in
Surface Area = 225 + ½(60)(7)
= 435 in.²
Option B:
BC = 49 feet
Solution:
Given m∠A = 130°,
AB = c = 30 feet
AC = b = 24 feet
BC = a = ?
Law of cosines:
![a^{2}=b^{2}+c^{2}-2 b c \cos A](https://tex.z-dn.net/?f=a%5E%7B2%7D%3Db%5E%7B2%7D%2Bc%5E%7B2%7D-2%20b%20c%20%5Ccos%20A)
Substitute the given values in the formula.
![$a^{2}=24^{2}+30^{2}-2\times 24 \times 30\times \cos 130^\circ](https://tex.z-dn.net/?f=%24a%5E%7B2%7D%3D24%5E%7B2%7D%2B30%5E%7B2%7D-2%5Ctimes%2024%20%5Ctimes%2030%5Ctimes%20%20%5Ccos%20130%5E%5Ccirc)
![$a^{2}=576+900-1440\times (-0.64)](https://tex.z-dn.net/?f=%24a%5E%7B2%7D%3D576%2B900-1440%5Ctimes%20%28-0.64%29)
![$a^{2}=1476+921.6](https://tex.z-dn.net/?f=%24a%5E%7B2%7D%3D1476%2B921.6)
![$a^{2}=2397.6](https://tex.z-dn.net/?f=%24a%5E%7B2%7D%3D2397.6)
Taking square root on both sides, we get
a = 48.96
a = 49 feet
BC = 49 feet
Option B is the correct answer.
If
we take a look at the data presented in the chart we can see the
damage that the head gasket on truck suffers according to the ambient
temperature. The correct answer is letter
C)
because there is a negative slope that is less than one and the
y-intercept begins 14 units up the y-axis.
<span>I
hope this helps, Regards.</span>