Mrs. Gainey needs to buy string for 5 students to do a science activity. Each student needs 2 feet of blue string and 1 foot of red string. How many yards of string does Mrs. Gainey need to buy?
Blue: 2 feet * 5 = 10 feet
10/3 = ___ yards
Red: 1 * 5 = 5 feet
5/3 = ____ yards
To calculate the total yards of string Mrs. Gainey needs to buy, we need to first determine the total amount of string required for all the students.
Each student needs 2 feet of blue string and 1 foot of red string.
So for 5 students, the total amount of blue string needed is 5 students × 2 feet/student = 10 feet.
Similarly, the total amount of red string needed is 5 students × 1 foot/student = 5 feet.
Now, since 1 yard is equal to 3 feet, we can convert the total amount of string needed from feet to yards.
The total amount of blue string needed in yards is 10 feet ÷ 3 = 3.33 yards (rounded to two decimal places).
The total amount of red string needed in yards is 5 feet ÷ 3 = 1.67 yards (rounded to two decimal places).
Finally, to find the total yards of string Mrs. Gainey needs to buy, we add the blue string and red string together:
3.33 yards + 1.67 yards = 5 yards
Therefore, Mrs. Gainey needs to buy 5 yards of string.