A 20-ohm resistor and a 30-ohm resistor are connected in par- allel to a 12-volt battery as shown. An ammeter is connected as
shown.
А.
12 V
20.
30.12
(A) What is the equivalent resistance of the circuit?
(B) What is the current reading of the ammeter?
(C) What is the power of the 30-ohm resistor?

this could be newton#'s law of cooling. the cooling curve is exponential

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

i would say