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3 years ago

S is inversely proportional to t . When s = 0.5 , t = 7 Work out t when s = 5

Mathematics

1 answer:

shtirl [24]3 years ago

4 0

Answer:

t = 0.7

Step-by-step explanation:

s = k/t where 'k' is the constant of variation

given: 0.5 = k/7 so k = 3.5

5 = 3.5/t

5t = 3.5

t = 0.7

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3 years ago

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2 years ago

Which set of numbers does not contain 70? A) whole numbers B) irrational numbers C) integers D) natural numbers

Alchen [17]

Answer:

B) Irrational numbers

Step-by-step explanation:

The given number is $70$ .

We know the number which doesn't have any fractional part or decimal part is an integer. Here, there is no fractional part with the number 70, so this is an integer.

This is one of counting numbers from the set of $\{ 1,2,3,4,5,...\}$ , so this is a natural number.

Also, this belongs to the set of whole numbers $\{0,1,2,3,...\}$ .

But, $70$ can be written in the form of $\frac {p}{q}$ as $70= \frac {70}{1}$ where $p=70$ , $q=1$ are integers and $q \neq 0$ , so this is a rational number.

We know that any number that belongs to the rational number is not an irrational number.

Hence, $70$ does not belong to the set of irrational numbers.

So, option $(B)$ is correct.

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3 years ago