Question

Rita and Jan are working on a school project together. Rita has completed 0.3 of her portion, and Jan has completed a portion as well. Use the model to complete the equation below and find how much of the total project Rita and Jan have completed.

In a 10x10 grid, three rows are filled with 16 dots, and four columns are shaded. The length of 'a' for the three rows is 0.3.

Answer 1

Rita and Jan have collectively completed 70% of their project, with Rita completing 0.3 and Jan completing 0.4 of their individual portions.

Step-by-step explanation:

Rita and Jan are working on a school project, and we need to find out how much of the total project they have completed. Rita has completed 0.3 of her portion. To determine how much Jan has completed, we look at the shaded portion which is represented by four columns in the 10x10 grid. Since the grid is a 10x10, each column represents 0.1, so four columns represent 0.4. Therefore, Jan has completed 0.4 of his portion. Adding Rita's 0.3 to Jan's 0.4 gives us 0.3 + 0.4 = 0.7 or 70% of the project completed by both Rita and Jan together.