Answer:
7
Step-by-step explanation:
Answer: 210
Step-by-step explanation: Since we are trying to find what 3/5 of a number gives you 126 You would divide 126 by 3 which equals 42 then you would add 126+42+42=210
<h3>(a) The rock splashes down when h(t) = 0. Set h(t) = 0 and solve for t using quadratic formula.</h3>
<h3>0 = − 4.9t^2 + 334t + 255</h3>
<h3>t = -0.75, 68.92</h3>
<h3>(Throw away the negative answer, since time can't be negative.)</h3>
<h3>t = 68.92 sec</h3>
<h3>(b) The rock is at it's peak when the slope of it's trajectory is zero. This trajectory is also the tangent line, so finding when the slope of the tangent line is zero is the goal. To do this, take the derivative of h(t) and set h'(t) = 0.</h3>
<h3>h'(t) = -9.8t + 334</h3>
<h3>0 = -9.8t + 334</h3>
<h3>t = 34.08 sec</h3>
<h3>Use this time to find the height of the ball h(t), so h(34.08 sec).</h3>
<h3>h(t) = − 4.9(34.08)^2 + 334(34.08) + 255</h3>
<h3>h(t) = 5946.6m</h3>
<h3> And follow me </h3>
The answer is B thank u for let me know if u need more help
Answer
Find out the how high up the wall does the ladder reach .
To proof
let us assume that the height of the wall be x .
As given
A 25-foot long ladder is propped against a wall at an angle of 18° .
as shown in the diagram given below
By using the trignometric identity
now
Base = wall height = x
Hypotenuse = 25 foot
Put in the trignometric identity
x = 23.8 foot ( approx)
Therefore the height of the ladder be 23.8 foot ( approx) .