(−∞,∞) infinite solutions
Let the horizontal distance is x and vertical distance is y and the distance between them is z
z^2 = x^2 + y^2
2z(dz/dt) = 2x(dx/dt) + 2y(dy/dt) divide by 2
z(dz/dt) = x(dx/dt) + y(dy/dt)
when y = 45 , x = 0 because the boy was under the balloon
after 3 secs: x = 15 * 3 = 45 , y = 5 * 3 = 15 , z = sqr(x^2 +y^2) = 75
z(dz/dt) = x(dx/dt) + y(dy/dt)
75(dz/dt) = 45(15) + 15(5) = 975
dz/dt = 13 ft/sec
Answer:
35/12 or 2 11/12
Step-by-step explanation:
1 1/6=7/6
2 1/2=5/2
7*5=35
6*2=12
3*12=36 so 35/12=2 11/12
Answer: 54 square yards
Step-by-step explanation:
Given: The area of the scale model of a playground is 6 square yards.
let l be the length and w be the width of the model of playground.
then .....(1)
The scale model is enlarged by a scale factor of 3 to create the actual playground.
Then length of playground = 3l
width of playground = 3w
Then the area of the playground=
By using (1), we get
The area of the playground=
Answer:
(3,0)
Step-by-step explanation: