They’ve already earned $105 so they need $45 more to reach their goal
The answer is option C. 9xy sqrt 2x
Sixth graders can have 4 groups of 4
seventh graders can have 5 groups of 4
Circumference; C = π2r
Diameter; D = 2r
So then ...
C = πD
7.38 = πD
7.38 / π = D
2.35 cm = D