Answer:
abc
Step-by-step explanation:
The answer is x=42.8+- (plus or minus) 12
So he should either have $30.80 or $44.80 left
Time taken to ride 1 mile=7 min.
So time taken to ride 4 mile=4×7=28min.
Answer:
the last one (bottom right)
Step-by-step explanation:
4×pi is the same as twice around the whole circle to the beginning. it is the same as 0°, and cos(0) = 1, and then -2×cos(0) = -2
so, we only need to look, where the function reaches -2.
it should be at x = 0, x = 0.5 and x = 1.