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3 years ago

I got the answer which is A and pls tell me if im right

Mathematics

2 answers:

galben [10]3 years ago

8 0

Answer:

Step-by-step explanation:

10%of 36=3.6

5% of 36= 1.8

3.6+1.8 will give you the right answer

Len [333]3 years ago

7 0

Answer:

yes you are correct A is the correct answer

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2 years ago

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3 years ago

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The volume of air inside a rubber ball with radius r can be found using the function vn What doerepresent? The volume of air ins

vekshin1

I would say it represents the volume function evaluated at r=5/7, or

V(5/7)=(4/3)π(5/7)² = 2.13714

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3 years ago

Sketch the region enclosed by y=3x and y=x^2 . Then find the area of the region.

kolezko [41]

Answer:

$A=4.5u^2$

Step-by-step explanation:

The integral of a function gives you the area under the curve, the subtraction of one of the areas from the other will give you the area in between.

The limits of integration are the points where the curves intersect each other(take the curves has a system of equation and solve for x and y):

$y=3x, y=x^2\\3x=x^2\\x^2-3x=0\\x(x-3)=0\\x_1=0\\x-3=0\\x_2=3$

$y_1=3x_1=3(0)=0\\y_2=3x_2=3(3)=9$

The integral will be the subtraction of the curve $y=3x$ and $y=x^2$ (In the graph you can see y=3x is the upper curve):

$\int\limits^3_0 {3x-x^2} \, dx =\left\frac{3x^2}{2}-\frac{x^3}{3}\right|^3_0=\frac{3(3)^2}{2}-\frac{(3)^3}{3}-\left(\frac{3(0)^2}{2}-\frac{(0)^3}{3}\right)\\\int\limits^3_0 {3x-x^2} \, dx =\frac{27}{2}-\frac{27}{3} =13.5-9=4.5u^2$

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2 years ago