This problem deals the rate of change.
For the formula of the area of a circle, we differentiate both sides with respect to time t.
(A = πr^2) d/dt
dA/dt = 2πr (dr/dt)
Since we don't know yet the radius r, the area of a circle is given.
A = πr^2
r^2 = A/π = 4π/π
r^2 = 4
r = 2 cm
Therefore, the rate of the radius is
dA/dt = 2πr (dr/dt)
dr/dt = (dA/dt)/(2πr)
dr/dt = π/(2π*2)
dr/dt = 0.25 cm/min
Hope this helps.
Answer:
<h2><u><em>
no solution, the equation is false</em></u></h2>
Step-by-step explanation:
what is the solution for the following equation 3(2x+3)=2(3x+4)?
3 * (2x + 3) = 2 * (3x + 4)
6x + 9 = 6x + 8
6x - 6x = -9 + 8
0 = ±1
the equation is false
K=2.35. You are correct.
Have a nice day! :)
Answer:
Step-by-step explanation:
we calculate how much 0.3% is from 3280
y=3280*0.3/100=9.84$
months in 9y
12*9=108
the interest of 9y
108y=1062.72$
the sum of interest + the money borrowed
1062.72+3280=4342.72$
Answer:
- 85 flashlights
- 17 sleeping bags
Step-by-step explanation:
One group of 5 flashlights and 1 sleeping bag will cost ...
$12×5 +45 = $105
The total cost of the order is $1785/$105 = 17 times that amount, so there were ...
17 sleeping bags ordered
17×5 = 85 flashlights ordered
