All categories

3 years ago

What would be the best way to select a biased sample for the following topic: How far do students at Alpha Elementary jump?

Mathematics

2 answers:

alexira [117]3 years ago

5 0

The answer is A)Randomly choose several students from each grade to test.

Airida [17]3 years ago

3 0

If you're looking for an unbiased answer then you could choose A C or D but a biased selection would be B because you are selecting specific students where as the other options are random selections. if it's not too late choose B!!

You might be interested in

Bases are squares with sides that measure 27 inches. The height is 12 inches.

Elan Coil [88]

Answer:

Part 1) $V=8,748\ in^3$

Part 2) $SA=2,754\ in^2$

Step-by-step explanation:

The correct question is

Find the volume and the surface area of a rectangular prism. Bases are squares with sides that measure 27 inches. The height is 12 inches.

Part 1) Find the volume of the prism

The volume of the prism is equal to

$V=Bh$

where

B is the area of the base

h is the height of the prism

Find the area of the base B

$B=27^2=729\ in^2$ ---> the base is a square

we have

$h=12\ in$

substitute

$V=(729)(12)=8,748\ in^3$

Part 2) Find the surface area of the prism

The surface area of the prism is equal to

$SA=2B+Ph$

where

B is the area of the base

P is the perimeter of the base

h is the height of the prism

Find the perimeter of the base P

$P=4(27)=108\ in$

substitute the values in the formula

$SA=2(729)+108(12)=2,754\ in^2$

3 0

3 years ago

A number and its absolutely value are equal. If you subtract 2 from the number and its absolute value are not equal. What do you

Naily [24]

$n-the\ number\\\\|n|=n\ then\ n\geq0\\\\|n-2|\neq n-2\ what's\ a\ number\\\\I\ think,\ it's\ n=1\\\\because\ |1|=1\ and\ |n-2|=|-1|=1\ \ \ :correct\ \ :)\\\\3\ is\ not,\ because:\ |3|=3\ and\ |3-2|=|1|=1\to3\neq1$