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denis23 [38]
4 years ago
10

What is the better buy? $5.05 for 5 cookies or $ 9.18 for 9 cookies?

Mathematics
2 answers:
suter [353]4 years ago
7 0

Answer:

5.05 for 5 cookies

Step-by-step explanation:

well 5.05/5 is 1.01 and

9.18/9 is 1.02 meaning even by a little, buying the 5 would be less per cookie

Alex73 [517]4 years ago
3 0

Answer:

5.05 for 5 cookies

Step-by-step explanation:

5.05 / 5 = $1.01 per cookie

9.18 / 9 = $1.02 per cookie

Choose the $5.05 because you're spending less per cookie

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263 grams dental stone powder
djyliett [7]

Answer:

21.29 milliliters

Step-by-step explanation:

First find how much water is need for 1 gram of stone by dividing both numbers by 263. Then multiplying both numbers by 70.

Grams : Milliliters

263       80

1           : 0.3042 (Rounded to 4 decimal places)

70        : 21.29 (Rounded to 2 decimal places)

6 0
3 years ago
PLEASE HELP! The length of time a full length movie runs from opening to credits is normally distributed with a mean of 1.9 hour
Jobisdone [24]

Answer:

A random movie is between 1.8 and 2.0 hours.

z=1.8-1.9/0.3= -0.33= 0.3707

z=2.0-1.9/0.3= 0.33= 0.6293

0.6293-0.3707= 0.2586

Therefore, the chance a random movie is between 1.8 and 2.0 hours long is 0.2586.

A movie is longer than 2.3 hours.

z=2.3-1.9/0.3 =1.33 =0.9082

1-0.9082= 0.0918

Therefore, the chance a movie is longer than 2.3 hours is 0.9082.

The length of movie that is shorter than 94% of the movies

z=x-1.9/0.3= 0.94

z=x-1.9/0.3= 1-0.94= 0.06

=x-1.9/0.3= 0.06= -1.56

x= 1.432

Therefore, the length of the movie that is shorter than 94% of the movies about 1.4 hours.  

Step-by-step explanation:

4 0
3 years ago
How do i convert a number to a scientific notation
Ede4ka [16]

Answer:

You write the non-zero digits, placing a decimal after the first non-zero digit. Then, you count the number of digits you need to move the beginning decimal to get to where your decimal is now. If you move the decimal to the left, then your power is positive.

Step-by-step explanation:

so for example, .005 would be 5x10^-2 and 500 would be 5x10^2

4 0
3 years ago
390 is 75% of what number?
guapka [62]
390 is 75% of 520        You divide 390 by 75 to get one percent and then multiply by one hundred to get 100 percent

7 0
3 years ago
Lucy made $65 for 5 hours of work.
shusha [124]

Answer:

169

Step-by-step explanation:

65 divided by 5 to get 13

and multiply that with 13

like this: 13x13

to get 169

6 0
3 years ago
Read 2 more answers
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