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

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex