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3 years ago

3.1 Write the following in scientific notationa) 217 000 000 b) 0,000 253

Mathematics

1 answer:

AlekseyPX3 years ago

6 0

Answer:

2.17 x 10^8

0.253 x 10^-4 if number is 0.000253 or 2.53 x 10^2 if number is 253

Step-by-step explanation:

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Suppose Carson worked as a babysitter for '8' hours one week. What is the minimum number of full hours he would need to work at

liubo4ka [24]

Answer:

The minimum number of full hours did Carson need to work at his father's business is 8 hours and 15 minutes

Step-by-step explanation:

Given as :

The total number of hours did Carson spent as baby sitting on one week = 5 hours

The rate at which he earn for baby sitting = $6 per hours

The rate at which he earn as job = $8 per hours

The total amount he will earn that week = $96

Let The minimum number of full hour he need to work = h

Now, According to question

The total amount he will earn that week = total number of hours did Carson spent as baby sitting on one week ×The rate at which he earn for baby sitting + The rate at which he earn as job × The minimum number of full hour he need to work

I.e $96 = $6 × 5 + $8 × h

Or, $96 = $30 + $8 × h

Or, 8 × h = 96 - 30

Or, 8 × h = 66

∴ h =

i.e h = 8.25 hours

So, The number of hours = h = 8 hours and 15 minutes

Hence,The minimum number of full hours did Carson need to work at his father's business is 8 hours and 15 minutes .

4 0

3 years ago

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Can someone please help me

Tcecarenko [31]

I got 6.708 if you do(sqr) 9 - (sqr)6 that equals 45 then √45 equals 6.078

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3 years ago

A jar contains at least 600 marbles. Two-thirds of the marbles are red. The rest are blue. How many marbles are blue?

shtirl [24]

Answer:

200 marbles are blue only if there are 600 marbles in total. If there are more than 600, you calculate by dividing the total number of marbles by three.

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3 years ago

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The Soup Shack usually makes tomato soup with 9 tomatoes for every 12 cups of soup. Today, they made 8 cups of soup with 6 tomat

matrenka [14]

Answer:

choice 3

Step-by-step explanation:

9/12 simplified = 3/4. 6/8 simplified =3/4

so they are the same

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3 years ago

A rectangle has an area of x square units. The rectangle is dilated to create a new rectangle with an area of 9x square units. D

Alika [10]

The reactangle has an area of x.

So that means two numbers multiplied to each other equal to x. We can just think of itwo numbers that when multiplied equal to x as a and b.

So that means the side lengths are <u />a and b. And ab = x (will be using this right next).

And it was multiplied by some scale factor that made the new area 9x. So if the scale factor is y, then:

$(y\times a)\times (y\times b)=9x$
$y^2ab=9x$
$y^2x=9x$
$y=3$

y can not equal to -3, because the length of a side of any polygon can never be negative.

So the dilation is 3.

And so if the dimension is 5 by 8.

Then the area is $5 \times 8=40$

And so then $x=40$

And then after the dilation, it would be $9x=9(40) = 360$

We could check it another way too. Since we said the scale factor is 3, then:

$( 5 \times 3) \times (8 \times 3) = 15 \times 24 = 360$

So basically 15 by 24 is the new dimensions :)

6 0

3 years ago

3.1 Write the following in scientific notationa) 217 000 000 b) 0,000 253​

3.1 Write the following in scientific notationa) 217 000 000 b) 0,000 253