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3 years ago

Notes on how to subtract/add with scientific notation

Mathematics

1 answer:

fomenos3 years ago

4 0

Answer:

1)Take the smallest power common

2) simply the bracket

3) multiply with the power taken common

Example:

5×10⁶ - 4×10³

Smaller power is 3, so take 10³ common:

10³[(5×10²) - 4]

10³[500 - 4]

10³(496)

496×10³

4.96×10⁵

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After going shopping we had 10% of our money left we spent 180 $ how much money did we have left

Marrrta [24]

Answer:

$18 :)

Step-by-step explanation:

10% of 180 is 18

4 0

3 years ago

PLEASE HELPP I NEED ASAP

nataly862011 [7]

Answer:

[-6, -2]
(-2, 1]
(1, 5]

Step-by-step explanation:

The question is asking you to identify the domain for each of the parts of the piecewise-defined function. This means you need to identify the corresponding part on the graph, and determine its horizontal extent.

<h3>Observation</h3>

The first step in solving a problem is to look at the given information. The graph is shown as three (3) non-overlapping horizontal line segments. The open- or filled-circle end points tell you whether that x-value is part of the line segment.

The blanks in the function definition are where the <em>domain descriptions</em> go for the piecewise-defined function. This means you have to match the function description to the left of "if x ∈" with the set of x-values it corresponds to. The "x ∈" notation suggests you want to specify the domain in "interval notation," rather than as an inequality.

<h3>Bottom piece</h3>

The first part of the function definition is ...

f(x) = -4

This matches the horizontal line segment at the bottom of the graph. The closed dots at its ends mean it is defined for ...

-6 ≤ x ≤ -2

In interval notation, a square bracket is used when the end point is included in the interval.

f(x) = -4 if x ∈ [-6, -2]

<h3>Middle piece</h3>

The second part of the function definition is ...

f(x) = -3

This matches the horizontal line segment in the middle of the graph. The open dot at the left end, and the closed dot at the right end mean it is defined for ...

-2 < x ≤ 1

We use a round bracket (parenthesis) when an end point is not included in the interval.

f(x) = -3 if x ∈ (-2, 1]

<h3>Top piece</h3>

The third part of the function definition is ...

f(x) = 4

This matches the horizontal line segment at the top of the graph. The open dot at the left end, and the closed dot at the right end mean it is defined for ...

1 < x ≤ 5

In interval notation, this is ...

f(x) = 4 if x ∈ (1, 5]

8 0

3 years ago

ethan bought 4 packages of pencils. after he gave 8 pencils to his friends, he had 40 pencils left over. how many pencils were i

marishachu [46]

Answer:

there was 12 pencil's in each package because 12 ×4=48 48 -8=40

4 0

3 years ago

A single number is chosen from the digits 1 through 30. Find the probability that the number is an even number or a number divis

ladessa [460]

Answer:

There is a 66.67% probability that the number is an even number or a number divisible by 3.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

Desired outcomes:

These are the following even numbers from 1 through 30: 2,4,6,8,10,12,14,16,18,20,22,24,26,28,30

There are 15 even numbers.

These are the following numbers divisible by 3 from 1 through 30:

3,6,9,12,15,18,21,24,27,30

We only count the odd numbers here, since we have already counted the even ones.

There are 5 odd numbers divisible by 3.

So there are 20 numbers that are even numbers or divisible by 3. So there are 20 desired outcomes.

Total outcomes:

There are 30 numbers from 1 through 30. So the number of total outcomes is 30.

Find the probability that the number is an even number or a number divisible by 3.

$P = \frac{2}{3} = 0.6667$

There is a 66.67% probability that the number is an even number or a number divisible by 3.

7 0

3 years ago

Please help me<br>I need this answer right now

djyliett [7]

Answer: I wow I don't know about the whole page but (Question 2 ) 24 multiplied by b equals number of mangoes in b boxes

Step-by-step explanation: I hope this makes sense.

b can be replaced with any number you can create a number sentence by plugging in 4 for example 24 * 4 = 96 so there is a total of 96 mangoes if b= 4

8 0

3 years ago