Answer:
Option D. 
Step-by-step explanation:
we know that
The equation of a vertical parabola in vertex form is equal to
where
(h,k) is the vertex of the parabola
If a> 0 then the parabola open up and the vertex is a minimum
If a< 0 then the parabola open down and the vertex is a maximum
In this problem the vertex is the point (-2,5)
so
the equation must be equal to
and the value of a is positive
therefore
the answer is the option D
20*31=620
620/2=310
20/2=10
31/2=15.5
The dimensions should be 10*15.5
With the information you provided, we can find an equation.
A=kB/(C^2) (k is a constant)
197= 5k/(5^2)
197=5k/25
197=k/5
k= 985
So find a if b=3 and c=3
A= 3(985)/(3^2)
A= 2955/9 is your answer.
9/12= 0.75
75%
If you want to check the answer, simply multiply 0.75 by 12 and you should get 9.
It can be deduced that the null hypothesis is H: p = 0.25 and the alternative hypothesis is H: p > 0.25.
<h3>What is the null hypothesis?</h3>
It should be noted that null and alternate hypothesis are written based on the population parameter.
From the information given, the claim is that they card was identified significantly more than chance would suggest. The proportion of card selected will be:
= 1/4 = 0.25
Therefore, the null hypothesis is H: p = 0.25 and the alternative hypothesis is H : p > 0.25.
Learn more about null hypothesis on:
brainly.com/question/25263462
