Answer:
3×22+3×54
as there's bracket, so c is the answer
Answer:x is 1
Step-by-step explanation:
Answer:B
Step-by-step explanation:
65•7
Answer: n=-2
Step-by-step explanation:
Given
The length of the football field is ![300\ ft](https://tex.z-dn.net/?f=300%5C%20ft)
In the mile, it can be expressed as ![5.7\times 10^n\ mile](https://tex.z-dn.net/?f=5.7%5Ctimes%2010%5En%5C%20mile)
Also,
or
![1\ ft=\dfrac{1}{5280}\ miles\\\\1\ ft=1.893\times 10^{-4}\ miles](https://tex.z-dn.net/?f=1%5C%20ft%3D%5Cdfrac%7B1%7D%7B5280%7D%5C%20miles%5C%5C%5C%5C1%5C%20ft%3D1.893%5Ctimes%2010%5E%7B-4%7D%5C%20miles)
converting
to miles
![\Rightarrow 300\times 1.893\times 10^{-4}\\\Rightarrow 5.68\times 10^{-2}\approx 5.7\times 10^{-2}](https://tex.z-dn.net/?f=%5CRightarrow%20300%5Ctimes%201.893%5Ctimes%2010%5E%7B-4%7D%5C%5C%5CRightarrow%205.68%5Ctimes%2010%5E%7B-2%7D%5Capprox%205.7%5Ctimes%2010%5E%7B-2%7D)
Comparing it with the given value ![5.7\times 10^n\ mile](https://tex.z-dn.net/?f=5.7%5Ctimes%2010%5En%5C%20mile)
we get ![n=-2](https://tex.z-dn.net/?f=n%3D-2)