The absolute value of the difference between the time anyone takes and 45 is less than or equal to 8
|t - 45| <= 8 is the correct choice ( the last one)
The diameter is twice the radius (D=2R), then
I'd say it's D. I know the effect is that the money is increased, however I don't know by exactly how much.
The 3 inside angles of a triangle need to add up to 180 degrees.
You have two angles of 104 and 36.
A = 180 - 104 - 36 - 40
The answer is 40
Both are not equivlant to the top speed of the model plane because caculator op.
