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3 years ago

You are making 100 mL of a saline solution in science class that has a strength of 50%.

Mathematics

1 answer:

NNADVOKAT [17]3 years ago

8 0

Answer:

thisis your answer 100,000

Step-by-step explanation:

100

this is how you add it and you will get your answer

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A leprechaun places a magic penny under a girls pillow. The next night there are 2 magic pennies under her pillow. The following

kiruha [24]

Answer:

After 47 days she will have more than 90 trillion pennies.

Step-by-step explanation:

At the beginning there was 1 penny. At the second day the amount of pennies under the pillow became 2.

The amount of pennies doubled each day. So the series is,

$1,2,4,8,16,32,.....$

This series is in geometric progression.

As the pennies from each of the previous days are not being stored away until more pennies magically appear so the sum of series will be,

$S_n=\dfrac{a(r^n-1)}{r-1}$

where,

a = initial term = 1,

r = common ratio = 2,

As we have find the number of days that would elapse before she has a total of more than 90 trillion, so

$\Rightarrow 90\times 10^{12}\le \dfrac{1(2^n-1)}{2-1}$

$\Rightarrow 90\times 10^{12}\le \dfrac{2^n-1}{1}$

$\Rightarrow 90\times 10^{12}\le 2^n-1$

$\Rightarrow 2^n\ge 90\times 10^{12}+1$

$\Rightarrow \log 2^n\ge \log (90\times 10^{12}+1)$

$\Rightarrow n\times \log 2\ge \log (90\times 10^{12}+1)$

$\Rightarrow n \ge \dfrac{\log (90\times 10^{12}+1)}{\log 2}$

$\Rightarrow n \ge 46.4$

$\Rightarrow n\approx 47$

8 0

3 years ago

Pls help me so I can pass

Maru [420]

Answer: John Hancock Center is faster

Step-by-step explanation:

If the equation is y=30x and x represents seconds then multiply 30 and 60 to get the amount of feet travelled per minute which is 1800. If 1800>1400 then John Hancock Center has a faster elevator rate.

7 0

3 years ago

Read 2 more answers

Mrs.Giblin begins hiking at mile marker 25 on the Appalachian Trail and hikes 3 miles every hour. What is the slope?

Ilya [14]

Answer:

3 miles

Step-by-step explanation:

Slope is simply the change in position per unit rate. We could conclude that the steepness of the Applachian is the rate of change in position per unit time. Since the distance hiked on the Applachian is said to be 3 miles per hour, then we can conclude that the slope of the applachian is 3 miles

This is the change in miles / change in time.

Chang in miles = 3

Change in time = 1

Slope = 3/1

Slope = 3

7 0

3 years ago

After her raise, Shannon earned 3/4 more than she previously made. If Shannon's weekly wages totaled $2100 after her raise, what

topjm [15]

So $2100 = 1+3/4 of her original raise.

Remember that 1 = 4/4, so in total it is 7/4 of her original pay (4/4+3/4). Let's find out what 1/4 is equal to.

If $2100=7/4 then 1/4=$300. Therefore 4/4 (or 1, her original pay) is 4 times $300, which is $1200.

8 0

3 years ago

Mo's farm stand sold a total of 165 pounds of apples and peaches. she sold apples for $1.75 per pound and peaches for $2.50 per

AVprozaik [17]

Let x and y be the number of pounds of apples and peaches, respectively. With this representation, two equations are generated.
(1) x + y = 165
(2) 1.75x + 2.50y = 337.50

Simultaneously solving for the values of x and y gives an answer of x = 100 and y = 65. Thus, Mo sold 65 pounds of peaches.

7 0

3 years ago