Unit: Trigonometric functions: possible incorrect answer

Some "Modeling with sinusoidal functions: phase shift" questions have an incorrect answer in the practice section of the Unit: Trigonometric functions HS Trig

I think one was a question about Pluto:

D(22) = -1.5cos(2pi(t+11)/248) +5.9 = 4.89 approx.

I think the answer should be:

D(22) = 4.40