She would drive up the hill C.2.87.The ovesiouse answer would have been c because if you do the math then it would give you 2.87.
Answer:
D). All three choose a valid step toward solving the equation
Step-by-step explanation:
Figures A, B, and C. The reason is because a polygon is a shape that has straight lines. A, B, and C are made up of straight lines. Figure D has curves at the corners, so that is not considered a polygon.
Answer: The required lifetime value is 11.27.
Step-by-step explanation:
Since we have given that
Mean value = 11 hours
Standard deviation = 1 hour
The total lifetime of all batteries in a package exceeds that value for only 5% of all packages.
So, α = 0.95, z= 1.645
n = 9
So, the lifetime value would be
![x=\mu+z\times \dfrac{\sigma}{\sqrt{n}}\\\\x=11+1.645\times \dfrac{1}{\sqrt{36}}\\\\x=11+1.645\times \dfrac{1}{6}\\\\x=11.27](https://tex.z-dn.net/?f=x%3D%5Cmu%2Bz%5Ctimes%20%5Cdfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%5C%5C%5C%5Cx%3D11%2B1.645%5Ctimes%20%5Cdfrac%7B1%7D%7B%5Csqrt%7B36%7D%7D%5C%5C%5C%5Cx%3D11%2B1.645%5Ctimes%20%5Cdfrac%7B1%7D%7B6%7D%5C%5C%5C%5Cx%3D11.27)
Hence, the required lifetime value is 11.27.
2. r/5=9/21
r x 21 = 9 x 5
r= 45/21
r= 2.14 ( the answer is B)
3. 4 cups-> 4 dozen
x cups-> 8 dozen
4/x = 4/8
X x 4= 4 x 8
x= 32/4
x= 8 cups