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2 years ago

Daniel has 280 baseball cards. 15% of there are rare collector's items. How

Mathematics

2 answers:

lions [1.4K]2 years ago

7 0

Answer:

the answer is 42. hope this helped

Katyanochek1 [597]2 years ago

4 0

First turn 15% into a decimal.

You get .15

Then multiply .15 by 280

You get 42

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DerKrebs [107]

9 c 10 b 11 b 12a 13 c 14 d 15 d 16c 17 a or c
18 b 19 d 20 is b

6 0

3 years ago

A well-mixed cookie dough will produce cookies with a mean of 6 chocolate chips apiece. What is the probability of getting a coo

posledela

The probability of getting a cookie with no more than 3 chips is 0.714.

<h3>What is probability?</h3>

It is defined as the ratio of the number of favorable outcomes to the total number of outcomes, in other words, the probability is the number that shows the happening of the event.

We have:

Well-mixed cookie dough will produce cookies with a mean of 6 chocolate chips apiece.

Using poison ratio:

$\rm P (X = k) = \dfrac{\lambda^k e^{-\lambda}}{k!}$

λ is the mean number of chocolate chips in a piece

$\rm P (X = 6) = \dfrac{6^k e^{-6}}{k!}$

P(X ≥ 5) = 1 - P(X < 5)

P(X ≥ 5) = 1 - P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4)

$\rm P(X \geq 5) = 1-[\dfrac{6^0 e^{-6}}{0!}+\dfrac{6^1 e^{-6}}{1!}+\dfrac{6^2 e^{-6}}{2!}+\dfrac{6^3 e^{-6}}{3!}+\dfrac{6^4 e^{-6}}{4!}]$

After solving;

P(X ≥ 5) = 0.714

Thus, the probability of getting a cookie with no more than 3 chips is 0.714.

Learn more about the probability here:

brainly.com/question/11234923

#SPJ1

6 0

2 years ago

The population of Hicksville increased from 20,000 to 24,500 in the past decade. What is the percent of increase in population o

Leona [35]

40 percent???

Step by step:

7 0

2 years ago

If the cost of a raffle ticket is $2, which of the following expressions could be used to represent the cost of m tickets? 2m 2

Phantasy [73]

2m would be your answer

Each ticket costs $2, which means that if you are buying more tickets, it would look like: 2 + 2.... instead of the others

hope this helps

4 0

3 years ago

Read 2 more answers

According to the Complex Conjugate Root Theorem, if a+bi is a root of a quadratic equation, then __blank__ is also a root of the

Trava [24]

Answer:

a-bi

Step-by-step explanation:

If a quadratic equation lx^2+mx+n=0 has one imaginary root as a+bi then the other root is the conjugate of a+bi = a-bi

Because we have l, m and n are real numbers and they are the coefficients.

Sum of roots = a+bi + second root = -m/l

When -m/l is real because the ratio of two real numbers, left side also has to be real.

Since bi is one imaginary term already there other root should have -bi in it so that the sum becomes real.

i.e. other root will be of the form c-bi for some real c.

Now product of roots = (a+bi)(c-bi) = n/l

Since right side is real, left side also must be real.

i.e.imaginary part =0

bi(a-c) =0

Or a =c

i.e. other root c-bi = a-bi

Hence proved.

3 0

3 years ago