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dolphi86 [110]
3 years ago
3

Five teachers were hired at Oakdale Middle School at the beginning of the 2005 school year. The performance of each teacher was

rated by the principal at the conclusion of each school year. The performance ratings are charted below. Please use this information to answer the question.
Which teacher exhibited the most variable year-to-year performance over this 5 year span?

Jill


Ed


Ralph


Sam

Mathematics
2 answers:
Lisa [10]3 years ago
7 0
Ed...................
MrRa [10]3 years ago
3 0

Answer:

Ralph

Step-by-step explanation:

Ralph's data goes from 5 to 2 to 2 to 1 to 1.  The spread of this data is larger than for any other teacher in the list.

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20 is how much less than 30? What percent less?
LenKa [72]

Answer:

33.3333% decrease

Step-by-step explanation:

Percent change formula: \frac{(x-y)}{|y|} *100, where x is the new value and y is the starting value.

Plug in values and solve:

\frac{20-30}{30} *100\\\frac{-10}{30} *100\\-0.3333*100\\

-33.3333% change, or a 33.3333% decrease.

7 0
3 years ago
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storchak [24]

Answer:

57.72 in^2

Step-by-step explanation:

Question 1. Shapes are triangle, semi-circle, and rectangle.

Question 2.Find area of rectangle first. Then area of triangle and circle. Subtract area of triangle and circle. Then add the difference with the rectangles area.

Question 3.

Rectangle's area:<u>48 in^2</u>

Triangles area:8*4/2=  <u>16 in^2</u>

Circle Area: pi*r^2/2(since its a semi-circle)

3.14*2^2=3.14*4=12.56/2=<u>6.28 in^2</u>

Question 4.

16-6.28=9.72

9.72+48=57.72 in^2

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3 years ago
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