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3 years ago

Can anyone help me with this question

Mathematics

1 answer:

Degger [83]3 years ago

8 0

Answer:

D maybe, i aint sure but seems right

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Most everyday purchases at the store are labeled with the price of the item before sales tax. Which expression could be used to

lord [1]

Original cost -total cost to get amount of tax.

4 0

3 years ago

A research team at Cornell University conducted a study showing that approximately 10% of all businessmen who wear ties wear the

LenKa [72]

Answer:

a) The probability that at least 5 ties are too tight is P=0.0432.

b) The probability that at most 12 ties are too tight is P=1.

Step-by-step explanation:

In this problem, we could represent the proabilities of this events with the Binomial distirbution, with parameter p=0.1 and sample size n=20.

a) We can express the probability that at least 5 ties are too tight as:

$P(x\geq5)=1-\sum\limits^4_{k=0} {\frac{n!}{k!(n-k)!} p^k(1-p)^{n-k}}\\\\P(x\geq5)=1-(0.1216+0.2702+0.2852+0.1901+0.0898)\\\\P(x\geq5)=1-0.9568=0.0432$

The probability that at least 5 ties are too tight is P=0.0432.

a) We can express the probability that at most 12 ties are too tight as:

$P(x\leq 12)=\sum\limits^{12}_{k=0} {\frac{n!}{k!(n-k)!} p^k(1-p)^{n-k}}\\\\P(x\leq 12)=0.1216+0.2702+0.2852+0.1901+0.0898+0.0319+0.0089+0.0020+0.0004+0.0001+0.0000+0.0000+0.0000\\\\P(x\leq 12)=1$

The probability that at most 12 ties are too tight is P=1.

5 0

3 years ago

Dependent events can best be described as

dem82 [27]

Answer:

Sonya watched

of a movie in the morning, and she watched some more at night. By the end of the day, she still had

of the movie left to watch. How much of the movie did Sonya watch at night?

Step-by-step explanation:

SORRY WRONG

8 0

3 years ago

Read 2 more answers

F(x) = x2 + 1 What is f(f(x))? O x + 2x²+1 O x + 2x²+2 x + 2 x+1

nadya68 [22]

Answer:

It's x^4+2x^2+2

Step-by-step explanation:

The argument of f(f(x)) function becomes x^2+1-> F=(x^2+1)^2+1 Opening the brackets you get my answer. Not sure if O sign stood for ^4.

5 0

4 years ago

What is a 20% tip, if the dinner bill is 123.43? Show your work.

Harrizon [31]

Answer:

24.686

Step-by-step explanation:

20% is 1/5 so you divide by five. 123.43/5 = 24.686

24.686

x 5

----------

400

3000

20000

100000

123430

add decimal

123.430

= 123.43

5 0

3 years ago