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Salsk061 [2.6K]
2 years ago
12

a bookstore sold 1,250 books in a month. if 70% of the books the store sold were paperbacks, how many paperback books did the st

ore sell in the month?
Mathematics
2 answers:
xeze [42]2 years ago
8 0
If you would like to know how many paperback books did the store sell in a month, you can calculate this using the following steps:

paperback books: 70% of the sold books = 70% of 1,250 books = 70% * 1,250 = 70/100 * 1,250 = 875 books

The correct result would be 875 paperback books.
viktelen [127]2 years ago
4 0
The store sold 70/100 x 1,250 = 0.70 x 1,250 = 875 paperbacks.
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omeli [17]

The half life of the substance is 6.92 days.

<h3>What is the Half life  ?</h3>

Half life can be defined as the time required to reduce the concentration to half of its initial value.

Here the equation given is

\rm N = N_o e^{-kt}

The concentration will reduce to half therefore

\rm   N= \dfrac{N_o}{2}

so,

\rm 39/2 = 39  e^{- 0.1001 * t_{1/2}}

ln 0.5 = - 0.1001 * t(1/2)

-0.693 = -.1001 * t(1/2)

t(1/2) = 6.92 days.

Therefore the half life of the substance is 6.92 days.

To know more about Half Life

brainly.com/question/24710827

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4 0
1 year ago
Write each expression as an equivalent expression with a single logarithm. Assume xx, yy, and zz are positive real
Alekssandra [29.7K]

Answer:

\ln(\frac{xx + yy}{zz})^{\frac{1}{2}}

Step-by-step explanation:

Given:

1/2(ln(xx + yy) − ln(zz))

Now,

From the properties of log function,

1)  n × ln(x) = ln(xⁿ)

and,

2)  ln(A) - ln(B) = \ln\frac{A}{B}

applying the properties in the given equation

we get the above equation as:

\frac{1}{2}(\ln\frac{xx + yy}{zz})        

( using the property 2 we get (ln(xx + yy) − ln(zz) = \ln\frac{xx + yy}{zz}  

or

⇒ \ln(\frac{xx + yy}{zz})^{\frac{1}{2}}    ( using the property 1 i.e n × ln(x) = ln(xⁿ) )

expression as an equivalent expression with a single logarithm is \ln(\frac{xx + yy}{zz})^{\frac{1}{2}}

3 0
3 years ago
Two planes intersect in exactly _____.
Roman55 [17]
C

Like two walls they touch the whole line
3 0
2 years ago
Read 2 more answers
Annabel and Riley were given a homework packet of 120 math questions to finish over the summer.
Lena [83]

Step-by-step explanation:

the answer is 25%

hope it helps!

7 0
2 years ago
There are 10 marbles in the bag. There are two purple marbles, 3 red marbles and 5 yellow marbles. You will pick a marble three
Evgen [1.6K]

Answer:

30/1000

Step-by-step explanation:

red has a chance of 3/10

purple has a chance of 2/10

yellow has a chance of 5/10

for probability, multiply the denominators together, and the numerators together

3*2*5 = 30

10*10*10 = 1000

So the probability of picking red, then purple, and then yellow with replacement is 30 of 1000

Hope this helps!

8 0
3 years ago
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