Density= mass/volume 0.492=mass/163.5 mass=0.492*163.5 mass =80.448gram
24 students and teachers rode to the zoo in vans and 385 students and teachers rode to the zoo in buses.
Step-by-step explanation:
Given,
Total number of students and teachers = 409
Students and teachers in each bus = 55
Students and teachers in each van = 12
Let,
x be the number of buses
y be the number of vans
55x+12y=409 Eqn 1
x = y+5 Eqn 2
Putting value of x from Eqn 2 in Eqn 1

Dividing both sides by 67

Putting y=2 in Eqn 2

Number of students and teachers who rode in vans = Number of vans * Teachers and student in each van
Number of students and teachers who rode in vans = 12*2 = 24
Number of students and teachers who rode in buses = 7*55 = 385
24 students and teachers rode to the zoo in vans and 385 students and teachers rode to the zoo in buses.
Keywords: linear equation, substitution method
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A circular sector is the area between two radii of a circle and the arc between them.
The area is indeed given by
pi*r^2*(arc angle/360)
=pi*10.5^2(118/360)
=36.1375 pi cm^2
=113.529... cm^2
Therefore your answer is correct, to the first decimal place.
Perhaps you can check if the question specifies a different accuracy for the answer, or a different value of pi to be used.
Answer:
4
Step-by-step explanation:
6/12= .5
3.5≈4