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3 years ago

8

Question 7 please help maths

1 answer:

Tcecarenko [31]3 years ago

5 0

The formula is right there, Mr. President.
All you need to do is write the numbers you know into the correct
places in the formula, and then find the value of the fraction.

The formula: Density = (mass) / (volume)

You know:
mass = 67.5 grams
volume = 5 ml

Write them in the correct places in the formula:

   Density = (67.5 grams) / (5 ml)

   = (67.5 / 5) (grams / ml)

   = 13.5 grams/ml

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3 years ago

irakobra [83]

A function can be represented by equations and tables

4 users are logged in by 9am
The domain is [3,23] and the range of the function is [3,4]

<h3>The number of users at 9am</h3>

The function is given as:

$g(x) = \frac14 \sqrt{x - 3} + 3$

At 9am, x = 9.

So, we have:

$g(x) = \frac14 \sqrt{9 - 3} + 3$

$g(x) = \frac14 \sqrt{6} + 3$

Simplify

$g(9) = 3.6$

Approximate

$g(9) = 4$

Hence, 4 users are logged in by 9am

<h3>The domain</h3>

Set the radical to 0

$x - 3 = 0$

Solve for x

$x = 3$

The maximum time after midnight is 23 hours.

So, the domain is [3,23]

<h3>The range</h3>

When x = 3, we have:

$g(x) = \frac14 \sqrt{x - 3} + 3$

$g(3) = \frac 14 * \sqrt{3 - 3} + 3 = 3$

When x = 23, we have:

$g(23) = \frac 14 * \sqrt{23 - 3} + 3 = 4$

So, the range of the function is [3,4]

Read more about domain and range at:

brainly.com/question/2264373

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