Speed of boat r mi/hr
speed of currect c mi/hr
speed downstream (c+r) mi/hr
but
distance= 4miles
time=1.5 hours
thus
speed=distance/time
hence:
4/1.5=(c+r)
thus
4=1.5c+1.5r
hence the answer is:
4=1.5c+1.5r
8 divided by 644 is 0.012422360248447
Answer:
a) {(3,3),(3,4),(4,5),(4,6)}
Step-by-step explanation:
Given
(a) to (d)
Required
Which is not a function
A relation is represented as:

For the relation t be a relation, then:
where 
This means that none of the x values must be related.
The first relation has 3 repeated as its value of . Hence, (a) is a relation
The rate of change will be given by:
v(h)=3√h=3h^0.5
The rate of change will be:
v'(h)=(3×0.5)x^-0.5=1.5x^-0.5
hence when h=2 meters, then the rate of change will be:
v'(h)=1.5×2^-0.5
v'(h)=1.061 m/s