3 years ago

Help!! this is a math assignment i have to finish, but i need help with this question.

Mathematics

1 answer:

Mnenie [13.5K]3 years ago

4 0

Answer:

$0.50

Solution:

First lets find how many cookies there are:

2.5*12= 30 cookies

Then we divide cost by cookie to see how much a cookie costs

$15/30 = $0.50

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What is the sum of a number n and 4 is no more than 13

posledela

N+4=13
-4 -4
n = 9

the sum of a number(n) and 4 that is no larger than 13 is 9

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3 years ago

The average and standard deviation of a measurement is 15.0 ± 5.0. if 100 students measured the value, how many would you expect

AURORKA [14]

Solution: We are given:

$\mu=15, \sigma=5$

Using the empirical rule, we have:

$\mu \pm \sigma$ covers 68% of data.

Also the percentage of values below mean = Percentage of values above mean = 50%

Now, let's find the z score for x=20

$z=\frac{20-15}{5}=1$

Therefore, the percentage of values greater than 1 standard deviation above mean $50\% - \frac{68\%}{2} =50\%-34\%=16%$

Expected number of students = 16% of 100 = 16

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3 years ago

Ryan wants to buy a new guitar that costs $325.00. He already has $75 in his account and makes $20 per day. How many days will h

san4es73 [151]

Answer:I pretty sure it will be 12.5
I subtracted the total cost for the guitar by the money he already had and got 250
Then I did 250/20 and got 12.5
250 is the money that he still needs for the guitar

Hope it helps

5 0

2 years ago

Turn 2 1/2 into a percentage

saw5 [17]

Answer:

250%

Step-by-step explanation:

(2 1/2) × 100%

= 250%

= 2.5

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2 years ago

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Please answer correctly !!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!

Nonamiya [84]

Answer:

Step-by-step explanation:

Pythagorean Theorem:

25^2=24^2+x

625=576+x^2

49=x^2

x=sqrt49

x=7

Hope this helps!

Merry Christmas!

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3 years ago

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