Whose measurements were the most precise?
julian's
mia's
sonu's
parul's
four students measure the length of a minute-long trial four
times. they record their measurements as shown.
julian:
57.3 seconds, 58.8 seconds, 59.5 seconds, 62.1 seconds
mia:
58 seconds, 59 seconds, 60 seconds, 61 seconds
sonu:
50 seconds, 60 seconds, 60 seconds, 70 seconds
parul:
57.23 seconds, 59.32 seconds, 62.34 seconds, 63.91
seconds
paul

Step-by-step explanation:

In finding the most precise measurement of the measurement of a minute long trial by the students , the average of the four experiments need to be calculated and the closest result to a minute (being the threshold ) is the most precise.

                                      Mila       Sonu        Parul

!st trial           57.3           58.8        59.5        62.1

Second trial  58               59          60           61

Third trial      50               60          60           70

Fourth trial   57.23          59.32     62.34      63.91

Total min.    222.53        237.12    241.84    257.01

Average min 55.63         59.28     60.46    64.25.

The most precise result is Mila experiment which is 59.28 being the closest measurement to a minute.

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

answer: the resulting cross section is a rectangle. solution: a plane parallel to the base of a triangular prism will intersect a cross section that is the same shape as its bases. so the cross section is a triangle.

step-by-step explanation: