You could do 30,30,20,20
Or 40,40,10,10
Or 45,45,5,5
Suppose U={0, 1, 2, 3, 4, 5, 6}, A={2, 4, 6}, and B={1, 2, 3}. Tell whether each statement is true or false.
mina [271]
That asks if A is a subset of U. Since each member of A, namely 2, 4 and 6, is also in U, A is indeed a subset of U.
Answer: TRUE
Answer:
Option D). 171 feet is correct
Step-by-step explanation:
Given that a toy rocket is launched from 42 feet above the ground.
The height is rocket is given by f(t)=![-16t^{2} +91t+42](https://tex.z-dn.net/?f=-16t%5E%7B2%7D%20%2B91t%2B42)
To find the height of the rocket above the ground after 3seconds :
Given that f(0)=42
Take t=3
f(t)=![-16t^{2} +91t+42](https://tex.z-dn.net/?f=-16t%5E%7B2%7D%20%2B91t%2B42)
f(3)=![-16(3)^{2} +91(3)+42](https://tex.z-dn.net/?f=-16%283%29%5E%7B2%7D%20%2B91%283%29%2B42)
f(3)=![-16(9) +91(3)+42](https://tex.z-dn.net/?f=-16%289%29%20%2B91%283%29%2B42)
f(3)=![-144 +273+42](https://tex.z-dn.net/?f=-144%20%2B273%2B42)
f(3)=171 feet
Therefore, option D). 171 feet is correct
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