Avarage speed is (60+30)/2 = 45 miles per hour
bot is the same , Do not think so it is a right question.
A and b are the correct answers
The slope is 3 y-intercept is 7 and the equation would be y=3x+7
If the number of bacteria
![b(t)](https://tex.z-dn.net/?f=b%28t%29)
is a function only of temperature
![t](https://tex.z-dn.net/?f=t)
, and the temperature
![t(h)](https://tex.z-dn.net/?f=t%28h%29)
is a function only of time in hours
![h](https://tex.z-dn.net/?f=h)
, then
![b(t(h))=b(2h+3)=20(2h+3)^4-70(2h+3)+300](https://tex.z-dn.net/?f=b%28t%28h%29%29%3Db%282h%2B3%29%3D20%282h%2B3%29%5E4-70%282h%2B3%29%2B300)
We see that the total legnth is 9 and 5/8 inches
each piece is 1 and 3/8 inches long
there are 7 pieces
a board that is 9 and 5/8 inches total legnth is cut into pieces that measure 1 and 3/8 inches is cut into 7 pices
not A, should be cut into 7 pices, not 9 and 5/8
not B because the board is 9 and 5/8 long
the answer is C