Answer: x=5
Step-by-step explanation:
In this question, it is given that two of the dimensions are 3 cm and 9 cm . Let the other dimension be x cm .
And the surface area of the rectangular prism is given. Now we use the formula of surface area of prism, which is
Subtracting 27 to both sides,
Dividing both sides by 12
So the length of the remaining dimension is 6 cm .
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Answer:
C. 28 fewer
Step-by-step explanation: Total population of students and teachers = 510
Students : teacher = 16 : 1
Population of students = 16/17 × 510 = 480 students
Number of kindergarten students = 1/5 of 480 = 1/5×480 = 96
Number of grade 5 and 6 students = 1/3 of (480 - 96) = 1/3×384 = 128
Number of grade 1 and 2 students = 1/4 of 480 = 1/4×480 = 120
Number of grade 3 and 4 = 480 - (96+128+120) = 480 - 344 = 136
Number of grade 3 students = 136/2 = 68
Number of kindergarten students = 96
Therefore, the number of students in grade 3 is 28 (96 - 68 = 28) fewer than the number of students in kindergarten
