By definition, the slope is the inclination of a line in relation to the horizontal. It can be expressed in degrees, ratios and even in percent. Therefore, you can calculate it by applying the following formula:
P%=(H/L)x100
P% is the slope expressed in percent.
H is the height (H=1.2 meters).
L is the length (L=4 meters).
When you substitute these values into the formula P%=(H/L)x100, you obtain the slope of the skateboard ramp:
P%=(H/L)x100
P%=(1.2 meter/4 meters)x100
P%=0.30x100
P%=30%
The answer is -28 if there is a negative then the answer is a negative
Answer:
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Answer:
A)
=0
B)t= 0.45 seconds or t= 3.5 seconds
<em>If time is greater than 0.45 seconds then ball will reach height 12m and higher.</em>
Step-by-step explanation:
Given Equation:
h(t)=
------------------------------(Equation 1)
a) Equation to tell if ball reaches height of 12m . for that :
h= 12m
put in Equation 1.
12 =
or
=12
or
-12 = 0
=0
or
= 0 -----------------------------------(Equation 2)
<em>This Equation tells if ball reaches height of 12m</em>
b) Does ball reaches height of 12m :
For that, the value of time can be found out from the equation above,
= 0
It can be solved using the quadratic formula:
![t= \frac{(-b) +_{-} \sqrt{b^{2} -4ac } }{2a}](https://tex.z-dn.net/?f=t%3D%20%5Cfrac%7B%28-b%29%20%2B_%7B-%7D%20%5Csqrt%7Bb%5E%7B2%7D%20-4ac%20%7D%20%20%7D%7B2a%7D)
![t= \frac{(20) +_{-} \sqrt{(-20)^{2} -4(5)(8) } }{2(5)}](https://tex.z-dn.net/?f=t%3D%20%5Cfrac%7B%2820%29%20%2B_%7B-%7D%20%5Csqrt%7B%28-20%29%5E%7B2%7D%20-4%285%29%288%29%20%7D%20%20%7D%7B2%285%29%7D)
t= 0.45 seconds or t= 3.5 seconds
If time is greater than 0.45 seconds then ball will reach height 12m and higher.
Answer:
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Step-by-step explanation: