I hope you can read this lol. the answer is 101
Answer:
i think its the first one but im not completely sure...
Answer:
29
Step-by-step explanation:
You need to find the average number of students
Add up all the students
27+31+28+33+26
145
Divide by the number of classes
145/5
29
The average is 29
Answer:
720.85 cm3
Step-by-step explanation:
As the cylinders are similar, the ratio of their diameters is the same ratio of their heights, so we have that:
d1 /d2 = h1 / h2
If the volume of the larger cylinder is 9600 cm3, we can find its height:
V = pi*r^2 * h
9600 = pi * 32^2 * h
h = 9600 / (pi * 32^2) = 2.9842 cm
Now we find h2:
64 / 27 = 2.9842 / h2
h2 = 27 * 2.9842 / 64 = 1.259 cm
Finally, we can find the volume of the smaller cylinder:
V = pi * r^2 * h
V = pi * 13.5^2 * 1.259 = 720.85 cm3
Answer:
• x = 9
• y = 6√2
Step-by-step explanation:
The right triangles are all similar, so the ratios of hypotenuse to short side are the same:
27/x = x/3
x^2 = 81 . . . . . multiply by 3x
x = 9 . . . . . . . . take the square root
Then y can be found from the Pythagorean theorem:
x^2 = y^2 + 3^2
81 - 9 = y^2 = 72 . . . . . subtract 9
y = √72 = 6√2 . . . . . . .take the square root
The values of x and y are 9 and 6√2, respectively.