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4 years ago

A packet of sweets costs $2.25.

Mathematics

2 answers:

harkovskaia [24]4 years ago

5 0

Felipe pays 1.4 dollars

saw5 [17]4 years ago

3 0

Felipe pays 1.4 dollars .

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The legs of a right triangle are 3 units and 2 units. What is the length of the hypotenuse? Round your answer to the nearest hun

marusya05 [52]

Answer:

It will be around 3.61

Step-by-step explanation:

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3 years ago

Hey, please help me, I'm fairly confused with this question. 25 points for the correct answer.

Advocard [28]

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Step-by-step explanation:

I used a triangle area calculator.

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3 years ago

Express the volume of each cube as a monomial m It's a cube with 4r^3s help

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3 years ago

IXL graph a line using slope

Mrac [35]

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4 years ago

In a parenting magazine, Mrs. Smith read an advertisement about all the different ways that bleach can be used to kill bacteria.

babymother [125]

Question:

(a) How many bacteria would be found in 24 hours

(b) How many bacteria would be found in 2 days

Answer:

(a) 282429536481 bacteria

(b) $7.97*10^{22$ bacteria

Step-by-step explanation:

The question illustrates an exponential function

$y = ab^x$

Where

$a = Initial\ Value = 1$

$b=Rate = 3$ --- i.e. triples

$x = number\ of\ hours$

Solving (a): Bacteria in 24 hours

In this case:

$x = 24$

Substitute $x = 24$ , $b = 3$ and $a = 1$

So:

$y = ab^x$

$y = 1 * 3^{24$

$y = 1 * 282429536481$

$y = 282429536481$ bacteria

Solving (b): Bacteria in 2 days

$2\ days =48\ hours$

So:

$x = 48$

Substitute $x = 48$ , $b = 3$ and $a = 1$

So:

$y = ab^x$

$y = 1 * 3^{48$

$y =7.97*10^{22$ bacteria

Solving (c): How long for 1000 bacteria

In this case:

$y = 1000$

Substitute $y = 1000$ , $b = 3$ and $a = 1$

So:

$y = ab^x$

$1000 = 1 *3^x$

$1000 = 3^x$

Take Log of both sides

$Log1000 = Log3^x$

This gives:

$Log1000 = xLog3$

Make x the subject

$x = \frac{Log1000}{Log3}$

$x \approx 6$

Hence: It takes 6 days

8 0

3 years ago