Answer:
Step-by-step explanation:
f(-x) is a reflection of f(x) in the y-axis
Answer: A
Explanation:
Because the center of circle A is (0,1) and circle B is one unit down, it would be x^2+y^2=1 because the center of circle B is (0,0). (The equation for a circle is (x-h)^2+(y-k)^2=r^2 with h and k as coordinates of the center of the circle and r as the radius.)
Answer:
15 is the distance
Step-by-step explanation:
Answer:
t = [0.493,4.2]
Step-by-step explanation:
The height of the rocket straight up into the air is given by :
![h(t)=-16t^2+85t+5](https://tex.z-dn.net/?f=h%28t%29%3D-16t%5E2%2B85t%2B5)
We need to find the interval the rocket be at least 43 feet above the ground.
![43\ge -16t^2+85t+5\\\\t\ge 0.493\ and\ t\le 4.82\ s](https://tex.z-dn.net/?f=43%5Cge%20-16t%5E2%2B85t%2B5%5C%5C%5C%5Ct%5Cge%200.493%5C%20and%5C%20t%5Cle%204.82%5C%20s)
So, the required interval during which the rocket is at least 43 feet above the ground is [0.493,4.2].