Answer:
C) 80 milliamperes
Step-by-step explanation:
The amount of current flowing through a circuit is directly proportional to the amount of voltage applied across the circuit. The relation between current(I) and voltage(V) can be expressed as:
![I \propto V\\\\I = \frac{1}{R}V](https://tex.z-dn.net/?f=I%20%5Cpropto%20V%5C%5C%5C%5CI%20%3D%20%5Cfrac%7B1%7D%7BR%7DV)
Here,
is the proportionality constant. It is given that, when voltage is 2 volts, 40 milliamperes(
amperes) current flow through the circuit. Using these values we can find the value of proportionality constant. i.e.
![40 \times 10^{-3}=\frac{1}{R} \times 2\\\\ \frac{1}{R}=20 \times 10^{-3}](https://tex.z-dn.net/?f=40%20%5Ctimes%2010%5E%7B-3%7D%3D%5Cfrac%7B1%7D%7BR%7D%20%5Ctimes%202%5C%5C%5C%5C%20%5Cfrac%7B1%7D%7BR%7D%3D20%20%5Ctimes%2010%5E%7B-3%7D)
Using this value, we can establish the relation between I and V as:
![I = 20 \times 10^{-3} \times V](https://tex.z-dn.net/?f=I%20%3D%2020%20%5Ctimes%2010%5E%7B-3%7D%20%5Ctimes%20V)
Now, we need to calculate value current (I) if voltage is equal to 4 volts. Substituting V = 4 in above equation, we get:
![I = 20 \times 10^{-3} \times 4\\\\ I = 80 \times 10^{-3}](https://tex.z-dn.net/?f=I%20%3D%2020%20%5Ctimes%2010%5E%7B-3%7D%20%5Ctimes%204%5C%5C%5C%5C%20I%20%3D%2080%20%5Ctimes%2010%5E%7B-3%7D)
Thus, the value of current will be 80 milliamperes
Answer:
![\boxed{\bold{x=7.5}}](https://tex.z-dn.net/?f=%5Cboxed%7B%5Cbold%7Bx%3D7.5%7D%7D)
Step By Step Explanation:
➤ Switch Sides
![\bold{\frac{x}{-0.5}=-15}](https://tex.z-dn.net/?f=%5Cbold%7B%5Cfrac%7Bx%7D%7B-0.5%7D%3D-15%7D)
➤ Multiply Both Sides By -0.5
![\bold{\frac{x\left(-0.5\right)}{-0.5}=\left(-15\right)\left(-0.5\right)}](https://tex.z-dn.net/?f=%5Cbold%7B%5Cfrac%7Bx%5Cleft%28-0.5%5Cright%29%7D%7B-0.5%7D%3D%5Cleft%28-15%5Cright%29%5Cleft%28-0.5%5Cright%29%7D)
➤ Simplify
![\bold{x=7.5}](https://tex.z-dn.net/?f=%5Cbold%7Bx%3D7.5%7D)
- Mordancy
Answer:
That is 4
Step-by-step explanation: First you need to substitute 9 in for m. Then multiply 4 x 9 to get 36. Then the square root of 36 is 6. Lastly 6-2 equals 4.
Answer:
20 are tomato plants it cant be 200 or 2000 and since its almost 50% 20 is your best option
Step-by-step explanation: