Can you solve this?

Question

1. In an electric circuit the resistance R, n ohms, increases when the current I, amps, in the decreases. The function R = 100/1² relates the resistance to the current.

 

a. What is the resistance when the current is 4 amps?

b. What is the resistance when the current is 20 amps?

c. What is the resistance when the current is 10 amps?

 

2. What value of x makes the denominator of each function equal to zero?

y = 9x/ 3x + 5

 

3. What is the vertical asymptote of the function?

y = 3/x - 1 - 3

Answer 1

1)

 

The formula is    R = 100 / I²

 

where:

R = resistance

I = current

 

a)

 

Evaluate  R when I=4

 

b)

 

Evaluate R when I=20

 

c)

 

Evaluate R when I=10

 

 

2 and 3)

 

Set the denominator equal to zero, and solve for x.