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rodikova [14]
3 years ago
6

david is taller than chris, chris is shorter than anne, anne is as tall as sarah, sarah is shorter than david. who is the shorte

st?
Mathematics
2 answers:
dybincka [34]3 years ago
4 0
David > Chris
Chris < Annie
Annie = Sarah
Sarah < David
David is out since he is taller that Chris.
Anne is out since she is taller than Chris.
Sarah is out since Anne and Sarah are the same height.
Chris is the shortest, because he is shorter than Annie and Sarah, while Sarah and Annie are shorter than David, but Chris is shorter than Annie so Sarah applies too, Chris is shorter than Anne and Sarah.
Shortest ---> Tallest:
Chris, Anne, Sarah, David
AURORKA [14]3 years ago
3 0

This is a problem involving comparisons; when you have a problem like that, is a good idea to compare two things at the time.

Let's compare our subjects

- Since David is taller than Chris and Chris is shorter than Anne, Anne is shorter than David (or David is taller than Anne).

- Since Chris is shorter than Anne and Anne is as tall as Sarah, Chris is also Shorter than Sarah.

- Since Sarah is shorter than David and Chris is Shorter than Sarah, Chris is also shorter than David.

From the first and third sentences we can infer that Chris is shorter than David. From the second sentence we can infer that Chris is shorter than Anne. From the second sentence we can infer that Chris is shorter than Sarah. Chris is shorter than everyone!

We can conclude that the shorter person is Chris.

In addition, we can follow a similar pat to discover who is the tallest:

We already know that the shorter person is Chris; since Anne and Sarah are taller than David and David is taller than Anne and Sarah, David is the tallest person. Sarah and Anne tie in second place.

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Help, please I need a mathswatch answer this is from the mathswatch website
torisob [31]

Answer:

158.76

Step-by-step explanation:

11.7*15.6=182.52

182.52/2=91.26

Area of BCD=91.26

7.5*18=135

135/2=67.5

Area of BAD=67.5

Altogether:

91.26+67.5=158.76

4 0
3 years ago
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il63 [147K]

is this a real question?

6 0
3 years ago
A manufacturer of skis produces two types: downhill and cross country. The times required for manufacturing and finishing each s
pogonyaev

Answer:

So to maximize profit 24 downhill and 20 cross country shouldbe produced

Step-by-step explanation:

Let X be the number of downhill skis and Y the number of cross country skis.

Time required for manufacturing and finishing each ski are: manufacturing time per ski, downhill 2.5 hours, cross country 1.5 hours

Finishing time per ski: downhill 0.5 hours, cross country 1.5 hours.

Total manufacturing time taken = (2.5) x+ (1.5+) y = 2.5x+1.5y≤90

total finishing time taken = 0.5x+1.5 y≤42

Profit function

Z = 50x+50y

Objective is to maximize Z

Solving the two equations we get intersecting point is

(x,y) = (24,20)

In the feasible region corner points are (0.28) (36,0)

Profit for these points are

i) 2200 for (24,20)

ii) 1400 for (0,28)

iii) 1800 for (36,0)

So to maximize profit 24 downhill and 20 cross country shouldbe produced.

6 0
3 years ago
The area of the circle is 132.7 square centimeters. What is the diameter
VladimirAG [237]
Equating the formula  (d is the diameter)

\pi d^2/4 = 132.7
d^2 = 132.7*4/\pi
d = \sqrt{169.044586}
d = 13.0017147331
d= 13cm
7 0
3 years ago
Change 2 hours and 36 mins to a mixed number
defon
You know you have two hours which will be the whole number. Then you take 36min and put it over 60min (total number of min in an hour) and you simplify by 6 to get 6/10 which can be simplified again to 3/5 so your final mixed number is
2 and 3/5 hours
5 0
3 years ago
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