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AlekseyPX
3 years ago
15

Marcus spent 10 hours doing his homework last week. This week he spent 11 hours doing homework. He says that he spent 110% more

time doing homework this week. Is he correct?
Mathematics
1 answer:
Andre45 [30]3 years ago
7 0

Answer:

[ 11 - 10 ] / 10 x 100%

= 1 /10 x 100%

= 10%

Only 10% longer

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A fan of country music plans to make a custom cd with 1313 of her 2525 favorite songs. how many different combinations of 1313 s
ss7ja [257]
This is asking how many ways can we choose 13 songs from a set of 25.
The formula is:
n! / r! * (n -r)!    =

25! / 13! * 12! which equals

25 *24 *23 *22 *21 *20 *19 *18 *17 *16 *15 *14 *13!  divided by
13! * 12! which equals

25 *24 *23 *22 *21 *20 *19 *18 *17 *16 *15 *14 divided by
12* 11* 10* 9* 8* 7* 6* 5* 4* 3* 2*

which equals

<span> <span> <span> 2,490,952,020,480,000 </span> </span> </span> divided by <span> <span> <span> 479,001,600 </span> </span> </span>

and that equals
<span> <span> <span> 5,200,300 </span> </span> </span> combinations

Here's a combination calculator to check your work:
http://www.1728.org/combinat.htm






4 0
3 years ago
Calculate (a) the number of milligrams of metoclopramide HCl in each milliliter of the prescription:
nalin [4]

Answer:

There are 100 milligrams of metoclopramide HCl in each milliliter of the prescription

Step-by-step explanation:

When the prescription says Purified water qs ad 100 mL means that if we were to make this, we should add the quantities given and then, fill it up with water until we have 100 mL of solution, being the key words qs ad, meaning sufficient quantity to get the amount of mixture given.

Then, knowing there is 10 grams of metoclopramide HCl per 100 mL of prescription, that means there is (1 gram = 1000 milligrams) 10000 milligrams of metoclopramide HCl per 100 mL of prescription. That is a concentration given in a mass/volume way.

Knowing the concentration, we can calculate it per mL instead of per 100 mL

Concentration_{metoclopramide HCL}= \frac{10000mg}{100mL} =100 \frac{mg}{mL}

7 0
3 years ago
Pwease help 1 more quesiton
Salsk061 [2.6K]
The answer is (2,-6) look at the picture to see how to do it

7 0
3 years ago
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55 is 40% of what number
SCORPION-xisa [38]
You simply put 40 over a hundred and 55 over n (which is the number were trying to find)  so you do cross multiplication. 55 times a hundred and after you get the answer. You divide it by 40 and should get 137.5.
3 0
3 years ago
Helpp please.. its due in 30 minutes
igor_vitrenko [27]

Answer:

option c is true.

.............

4 0
3 years ago
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