Answer:
0
Step-by-step explanation:
Anything times 0 is 0
Answer:
B is the answer. It keeps going up by 3 every time.
Step-by-step explanation:
Answer:
<h2>
</h2>
Step-by-step explanation:
S = 2πr² + 2πrh
<u>Move 2πr² to the left side of the equation</u>
That's
2πrh = S - 2πr²
<u>Divide both sides by 2πr to make h stand alone</u>
That's
<h3>
</h3>
We have the final answer as
<h3>
</h3>
Hope this helps you
<h3>
Answer: 14 km per hour</h3>
=====================================================
Work Shown:
x = rowing speed when there is no current
c = speed of the current
speeds are in km per hour
-----------
Going downstream, i.e. with the current:
x+c = faster speed since the current is pushing you
distance = rate*time
d = r*t
40 = (x+c)*2
x+c = 40/2
x+c = 20
c = 20-x
-----------
Going upstream, i.e. against the current:
x-c = slower speed since the current is working against you
d = r*t
16 = (x-c)*2
16 = 2x-2c
2x-2c = 16
2(x-c) = 16
x-c = 16/2
x-c = 8
x-(20-x) = 8 ... plug in c = 20-x
x-20+x = 8
2x-20 = 8
2x = 8+20
2x = 28
x = 28/2
x = 14 km per hour is the rowing speed when there is no current
Side note: the speed of the current is c = 20-x = 20-14 = 6 km per hour.
