Answer:
He is 20 at oldest, or
Step-by-step explanation:
The first step in finding a possible age is:
Subtract 10 from 51, and you get 41. Divide by 2, and you get about 20.5.
This means Joe is younger than or 20 years old.
The arch of the Gateshead Millennium Bridge forms a parabola with equation:
1 answer:
Answer:
about 106 meters
Step-by-step explanation:
The difference in x-values when y=0 is found by solving ...
0 = -0.016(x -52.5)² +45
-45 = -0.016(x -52.5)² . . . . . . subtract 45
45/0.016 = (x -52.5)² . . . . . . . divide by the coefficient of the squared term
±√2812.5 = x -52.5 . . . . . . . . take the square root
x = 52.5 ±√2812.5 . . . . . . . . .add 52.5. These are the x-values where y=0.
So, the difference in x-values at y=0 is ...
(52.5 +√( )) - (52.5 -√( )) = 2√2812.5 ≈ 106.07 . . . . meters
The width of the arch at ground level is about 106 meters.
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