60 x 3
90 x 2
30 x 6
5 x 36
45 x 4
20 x 9
18 x 10
12 x 15
Answer:
The anwers Is C and E.
Step-by-step explanation:
A relationship between two quantities is proportional if the ratio between those quantities is always equivalent.
Hint #22 / 4
Let's look at the ratio between right- and left-handed students at East Middle School.
6
0
9
right
5
8
left
=
1
0
.
5
right per left
58left
609right
=10.5 right per left
At East Middle School, there are
1
0
.
5
10.5 right-handed students for every left-handed student.
Hint #33 / 4
Now we can compare the other combinations of values for left-handed and right-handed students. Which ratios are equivalent to the ratio at East Middle School?
So the anwers is C AND E
Answer:
Trillion is a 1 with 12 zeros after it, and it looks like this: 1,000,000,000,000.
Step-by-step explanation:
Answer:
Step-by-step explanation:
concentration = amount of salt/solution
A) Initial concentration= 90/1000 = 0.09
Q = quantity of salt
Q(0) = 90 kg
Inflow rate = 8 l/min
Outflow rate = 8 l/min
Solution = 1000 L at any time t.
Salt inflow = 0.045 * 8 per minute
= 0.36 kg per minute
This is mixed and drains from the tank.
Outflow =
Thus rate of change of salt
Q'(t) = inflow - outflow =
Separate the variables and integrate
Use the fact that Q(0) = 90
90 = 360-A
A = 270
So
B) Q(t) = 360-270e^-0.004 = 91.07784
C) When t approaches infinity, we get
Q(t) tends to 360
So concentration =360/1000 = 0.36
Answer:
Correct option: D
Step-by-step explanation:
In the figure we have a right triangle, that is, one of the angles is a 90° angle. Therefore, we can use the Pythagoras' theorem to find the relation between the sides of the triangle:
Where b and c are cathetus of the triangle (sides adjacent to the 90° angle) and a is the hypotenuse (opposite side to the 90° angle).
So in our case, we have that x is the hypotenuse, and 40 and 42 are cathetus, so we have:
So the correct option is D.