Aradio station have free tickets to 10% of the people attending a concert. the radio station gave 640 people free tickets. what is the total number of people who attended the concert?

What is this inequality notation? t is less then or equal to 2

Complete the steps, which describe how to find the area of the shaded portion of the circle. find the area of the sector by multiplying the area of the circle by the ratio of the to 360. subtract the area of the triangle from the area of the sector.

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?