Answer: A) 264ft/minute
Step-by-step explanation:
1. Based on the information given in the problem, the speed of the track runner was 3 miles per hour ().
2. If you want to know the speed of the track runner in feet per minute, you need to apply the following proccedure:
3. Therefore, the answer is the option A.
- ∆ABD is right angled hence area:-
There is only one option containing 6x^2 i.e Option D.
Hence without calculating further
Option D is correct
<h3>Given</h3>
- C(t) = 40 cm + t·(2/5 cm/s) . . . circumference of a circle vs time
<h3>Find</h3>
- dr/dt for radius r
- r at t=4 seconds
<h3>Solution</h3>
The circumference and radius of a circle are related by
... C = 2πr
so the radius in terms of circumference is
... r = C/(2π)
... r(t) = (40 +0.4t)/(2π) = (1/π)(20 cm + 0.2t cm/s)
Then dr/dt is
... dr/dt = 0.2/π cm/s
And the radius at t=4 s is
... r(4) = (1/π)(20 + 0.2·4) cm
... r(4) = 20.8/π cm
Answer:
2c-3y-4=0
Step-by-step explanation:
Standard form is when the answer is equal to zero.
Answer:
divide 70 by 5 which equals to 14
Step-by-step explanation: