1) The radius would be r = x + 4y
<span>.... and the area would be A = pi ( x + 4y )^2 </span>
<span>2) x is not defined. You have to state the relationship of x with l ,w, and, h </span>
<span>3) The square prism is a cube. I assume that the edge is x. Then the perimeter of any one face is : </span>
<span>... p = 4x</span>
Let x = speed and y = distance
y = x * 45
y = (x - 4) * 70
45x = 70x - 280
-25x = -280
x = 11.2
Put it back into the first equation:
y = 11.2 x 45
y = 504miles
Hope this helps! Any questions let me know :)
Answer:
i think is B.
Step-by-i step explanation:
Here's our equation.

Let's reorder this so t² comes before t.

We want to find out when the ball hits the ground. Essentially, <em>what is t when h=0?</em>
Let's plug in 0 for h and solve.

From here we can use a number of methods to solve.
Methods such as splitting the middle, quadratic formula, etc. are not necessary for this equation, however. The best method here is just plain factoring.
-16t² and 176t are both divisible by 16t.

Now we want t to equal zero. If either of those factors were zero, then the whole thing would be zero when we multiply by it. The first option is obvious. If t were 0, 16t would be 0. That's when the ball is first kicked off the ground. The other, 11-t, works out to be
t = 11.
The area is a function of the apex angle β according to
Area = (1/2)(2 cm)²×sin(β)
This will be a maximum for β = 90°. The corresponding length of the third side is
2√2 cm
≈ 2.2828 cm