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Alja [10]
3 years ago
7

Un radar de l'armée américaine réussit à détecter tout ce qui se trouve à un rayon représenté

Mathematics
1 answer:
WARRIOR [948]3 years ago
8 0

Répondre:

r <27

Explication étape par étape:

Compte tenu de l'inégalité 5r + 9> 10r - 126

Nous devons trouver l'ensemble de solutions

5r + 9> 10r - 126

Ajouter 126 des deux côtés

5r + 9 + 126> 10r - 126 + 126

5r + 135> 10r

5r-10r> -135

-5r> -135

Divisez les deux côtés par -5 (notez que le signe changera)

-5r / -6 <-135 / -5

r <27

Par conséquent, les ensembles de solutions sont des valeurs inférieures à 27

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Taxi B
2miles £1.25+£4.00=£5.25

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3miles £3.50+£5.25=£8.75
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Taxi A
4miles £3.50+£7.00=£10.50
Taxi B
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Taxi A
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Taxi B
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Taxi A
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Taxi B
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Taxi A
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Taxi B
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^^^
They would have to drive 9 miles for the taxi to cost the same.

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2 years ago
A man weighing 800 N is hanging from a 2 mm diameter titanium wire with a cross-section of 3 x 10^-6 m^2. Will the wire break?
DENIUS [597]

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Since stress is greater than ultimate strength, the wire will break.

Step-by-step explanation:

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\sigma = \frac{4\cdot F}{\pi\cdot D^{2}} (1)

Where:

F - Axial force, measured in newtons.

D - Cross-section diameter, measured in meters.

Please notice that axial force is the weight of the man hanging from wire.

If we know that F = 800\,N and D = 0.002\,m, then the axial stress experimented by the titanium wire is:

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3 0
3 years ago
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= (22/7) × 24

= 528/7

= 75.43

4 0
3 years ago
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