Answer:
-30
Step-by-step explanation:
2*5 is 10
10*-3 is -30
The following polynomial is not written in standard form so it is false
let
r--------> Alvin's average paddling rate in km/hour
y -------> speed of the current
in km/hour
we know that
speed= distance/time
------> solve for distance
distance=speed*time
to Campsite against the current
speed=r-y-----> speed=(r-3)
time=8 hours
distance=(r-3)*8------> equation 2
From Campsite with the current
speed=r+y-----> speed=(r+3)
time=3 hours
distance=(r+3)*3------> equation 1
equate equation 1 and equation 2-----> because is the same distance
(r+3)*3=(r-3)*8----> 3r+9=8r-24----> 8r-3r=24+9-----> 5r=33----> r=6.6 km/hour
therefore
the answer is
Alvin's average paddling rate is 6.6 km/hour
Answer:
A
Step-by-step explanation:
The volume of a cone has the formula:

Where
V is the volume
r is the radius
h is the height
Given,
h = 50
V = 5400π
We want the radius, r.
Lets substitute and solve for r:

The radius is 18 meters
Correct answer A