The potential difference across the two ends of a bulb is 20V and the current flowing through it is 5A. Find the resistance
offered by the bulb.​

4 Ohms

Explanation:

Using the formula V = IR

where V = Voltage

I = Electric Current

R = Resistance

Making R the subject of the formula;

R = V/I = 20/5

Thus, R = 4 Ohms

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.