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3 years ago

12

the value Q of a material is directly proportional to the square of its weight W. if a material weighing 20kg is worth $500, fin

d the value of a material weighing 5kg

1 answer:

Harrizon [31]3 years ago

6 0

Answer:

125$

Step-by-step explanation:

if it's proportional that means it will move up or down in equal amounts

going down from 20 to 5 kg means I divided by 4

so I can also divide 500 by 4 and get 125$

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46. An olympic athlete has just completed a four mile run. His average time was 6 minutes per mile. If he ran the first and last

uranmaximum [27]

Answer:

7 minutes

Step-by-step explanation:

average time = 6 minutes per mile

sum = average * count = 6 minutes / mile * 4 miles = 24 minutes

first + last mile = 5 + 5 = 10 minutes

first + second + third + last mile = sum = 24 minutes

second + third = sum - first - last = 24 - 5 - 5 = 24 - 10 = 14 minutes

average of 2 miles in the middle = sum / count = 14 minutes / 2 = 7 minutes

4 0

2 years ago

T - 7 < 10, t = 28<br> show the work plz

Rasek [7]

T - 7 < 10, T = 28
28 - 7 < 10
21 < 10
FALSE

8 0

3 years ago

Read 2 more answers

In Exercise, sketch the graph of the function.<br> f(x) = ln(x – 5)

Flauer [41]

Answer:

See the graph and explanation below.

Step-by-step explanation:

For this case we have the following function:

$f(x) = ln(x-5)$

The domain for this function is given by:

$x-5 >0$ since the natural log is not defined for negative numbers

$x>5$ , $D = x \in (5,\infty)$

We can calculate some points in order to see the tendency of the graph, we can select a set of points for example $x =5.5, 6,7,8,9,10$ and we can calculate the values for f(x) like this

x=5.5

$f(x=5.5) = ln(5.5-5) = ln(0.5) =-0.693$

x=6

$f(x=6) = ln(6-5) = ln(1) =0$

That represent the x intercept

x=7

$f(x=7) = ln(7-5) = ln(2) =0.693$

x=8

$f(x=8) = ln(8-5) = ln(3) =1.099$

x=9

$f(x=6) = ln(9-5) = ln(4) =1.386$

x=10

$f(x=10) = ln(10-5) = ln(5) =1.609$

And that represent the x intercept

And then we can see the plot on the figure attached.

8 0

3 years ago

Marnie Walsh purchased a deluxe dictionary for $38.75 and a full-color atlas for $41.10. The state sales tax is 6%, the city tax

hjlf

Tax=2.5+6+1=9.5
deluxe=38.75x1.095=42.43125
fc atlas=41.10x1.095=45.0045
total purchase price=87.43576
rounded=87.44

3 0

3 years ago

Read 2 more answers

Will mark brain list if answered correct) On this number line, zero represents sea level. Plot the following points based on the

Flauer [41]

Answer:

The points would be:

1.5

4.5

-2

-4

1

-2.5

4

3

-3.5

5

Step-by-step explanation:

8 0

3 years ago