Which number is not in scientific notation?
6 ⋅ 10^25
2.01 ⋅ 10^−2
1.3 ⋅ 10^−4
0.5 ⋅ 10^3

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Simplify. 3(4+4x) (type your answer in with no spaces)