<span>circumference = 5 * PI = </span><span><span><span>15.7079632679
</span>
</span>
</span>
<span>arc length = circumference • [central angle (degrees) ÷ 360]
</span>arc length = <span><span>15.7079632679
</span>
* 60 /360
</span>arc length =
<span>
<span>
<span>
2.617993878
</span>
</span>
</span>
We observe that 14 is 4 more than twice 5.
The scooter's rate is 14 mph.
The bicycle's rate is 5 mph.
_____
time = distance/rate
14/(2b +4) = 5/b . . . . . . let b represent the bicycle's speed in mi/h
14b = 10b +20 . . . . . . . .cross multiply
4b = 20 . . . . . . . . . . . . . subtract 10b
b = 5 . . . . . . . . . . . . . . . divide by 4. Same answer as above.
Answer:
V = πr³ + 2πr²
Step-by-step explanation:
Volume of a cylinder:
V = πr²h
with radius r and height h = 2 + r:
V = πr²(2 + r) = πr³ + 2πr²
