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bezimeni [28]
3 years ago
15

1. [4 marks] Every morning, a boy scout raises a flag with a mass of 1.5 kg to the top of a 15.0 m

Mathematics
1 answer:
xeze [42]3 years ago
7 0

Answer:

work = force * distance

soo...

Step-by-step explanation:

force = mass * gravity

(1.5 kg )*(9.8 m/s^{2}) = 14.7 kgm/s^{2}  or Newtons  

W = 14.7 N * 15 m = 220.5 Nm  and since 1  N = 1 Joule

we say  220.5 Joule  

220.5 J   :)

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Find the value of c such that the expression is a perfect square trinomial
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Answer:

c = 4

Step-by-step explanation:

In a perfect square trinomial, the following relationship is true:

(x+y)^2=x^2+2xy+y^2

In order for the given expression to be a perfect square trinomial:

x^2=x^2\\4x=2xy\\c=y^2

Solving for 'c':

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Therefore, c must be equal to 4.

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Ahat [919]

Answer:

                          Cat owner           Dog owner           Total

Wet food                    9                         13                    22

Dry food                    10                        14                     24

Total                          19                        27                     46

Step-by-step explanation:

It is given that 9 cat owners and 13 dog owners chose "Wet food". 10 cat owners and 14 dog owners chose "Dry food".

Cat owners-Wet food = 9

Dog owners-Wet food =13

Cat owners-Dry food = 10

Dog owners-Dry food =14

We need to construct a two-way frequency table for the data.

Take owners in the first row and type of food in first column and construct a two-way frequency as shown below:

                          Cat owner           Dog owner           Total

Wet food                    9                         13                    22

Dry food                    10                        14                     24

Total                          19                        27                     46

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