The mean temperature for the first 4 days in January was -12°C. The mean temperature for the first 5 days in January was -13°C.
What was the temperature on the 5th day?

Step-by-step explanation:

Given

To find

Solution

The difference is the temperature on the 5th day:

hello from mrbilldoesmath!

answer:   x^2 + y^2 = 1024

discussion:

the equation of a circle with center (h,k) and radius "r" is

(x-h)^2 + (y-k)^2 = r^2.

in our case

(x-0)^2 + (y-0) ^2 = 32^2 = 1024

you,

mrb