Answer:
Angle B is 45°
Step-by-step explanation:
Since a and b are both of length 20, this is an isosceles right triangle, and the angle opposite side b must be 45°.
4,752. It's a big number.
Answer:

Step-by-step explanation:
So we have the equation:

And we want to solve for a.
So, subtract 1.2a from both sides:

Now, subtract 3.4b from both sides:

And that's our answer :)
Step-by-step explanation:
The height of the rocket y in feet is related to the time after launch, x in seconds, by the given equation i.e.
......(1)
It is required to find the maximum height reached by the rocket. For maximum height put
.
So,

Put x = 5.15 in equation (1).

So, the maximum height reached by the rocket is 503.39 m.