Every possible cross section of a three dimensional figure is a circle what is that figure
2 answers:
Answer:
Sphere
Step-by-step explanation:
Please refer to the attachment. Sphere is the 3D figure which when intersected by any plane , it will give us the circle. In attachment we see a red sphere of radius of 1. And the grey xy plane is intersecting the sphere which giving us the horizontal circle. Similarly yz and xz plane on intersecting gives two vertical circles. It is not just xy , yz, or xz plane but any plane when intersected to sphere gives a circle.
Hence our answer is Sphere
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Answer:
The ultra-marathon Idita Rod Trail is about 38 times longer than the Boston Marathon.
Step-by-step explanation:
Let
x -----> the length of the Boston Marathon in meters
y -----> the length of the Idita rod Trail Invitational ultra-marathon in meters
we have
we know that
To find out how many times as long is the course of the Idita rod Trail ultra-marathon as that of the Boston Marathon, divide the length of the Idita rod Trail Invitational ultra-marathon by the length of the Boston Marathon
so
Remember that
To divide two numbers in scientific notation, divide their coefficients and subtract their exponents
therefore
The ultra-marathon Idita Rod Trail is about 38 times longer than the Boston Marathon.
Answer:
1,496 new car buyers
Step-by-step explanation:
The sample size n in Simple Random Sampling is given by
where
z = 1.645 is the critical value for a 90% confidence level (*)
p= 0.33 is the population proportion.
e = 0.02 is the margin of error
so
<em>(*)</em><em>This is a point z such that the area under the Normal curve N(0,1) inside the interval [-z, z] equals 90% = 0.9</em>
It can be obtained in Excel or OpenOffice Calc with
<em>NORMSINV(0.95)</em>