Which of the following statements is false regarding randomization?

Answers

Answer 1

Answer:

Answer:b

Step-by-step explanation:

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126314 tickets have been sold to a concert. On average, each ticket holder throws away 942grams of rubbish. The rubbish will be taken away in trucks that must not carry more than 575 kilograms each. Estimate the number of trucks that will be needed?

Answers

So, there are 118,987,788 grams of rubbish in total, which is equal to 118,987.788 kg of rubbish (as there are 1000g to a kilogram). Therefore, there are 118,987.788/575 = 206.94 trucks required, and thus 207 trucks will be required to carry the rubbish, as you can't have 0.94 of a truck.

Find the domain of f and f −1 and its domain. f(x) = ln(ex − 3). (a) Find the domain of f. (Enter your answer using interval notation.) (−2,[infinity]) (b) Find f −1. f −1(x) = x+ln(3)

Answers

Answer:

a.Domain of f=(1.099, $\infty)$

b. $f^(-1)(x)=ln(e^x+3)$

Step-by-step explanation:

Let $y=f(x)=ln(e^x-3)$

We know that domain of ln x is greater than zero

$e^x-3>0$

Adding 3 on both sides of inequality

$e^x-3+3>0+3$

$e^x>3$

Taking on both sides of inequality

$lne^x>ln 3$

$x>ln 3$ =1.099

By using $lne^x=x$

Domain of f=(1.099, $\infty)$

Let $y=f^(-1)(x)=ln(e^x-3)$

$e^y=e^x-3$

By using property $lnx=y\implies x=e^y$

$e^x=e^y+3$

Taking ln on both sides of equality '

$lne^x=ln(e^y+3)$

$x=ln(e^y+3)$

Replace x by y and y by x

$y=ln(e^x+3)$

Substitute y= $f^(-1)(x)$

$f^(-1)(x)=ln(e^x+3)$

Write two fractions whose quotient is 28/45?

Answers

Answer:

(7/9) ÷ (5/4) = 28/45

Step-by-step explanation:

Fractions can be divided by using the rule "invert and multiply". We can look at the factors of 28 and 45 to see what might have been multiplied to get these numbers.

28 = 1·28 = 2·14 = 4·7

45 = 1·45 = 3·15 = 5·9

So, there are a number of possibilities. A couple of them are ...

28/45 = (7/9) × (4/5) = (4/9) × (7/5)

If we choose to use the first of these pairs of fractions, we can invert one of the fractions to make the denominator, then write the quotient as either of ...

(7/9) ÷ (5/4)

(4/5) ÷ (9/7)

a technician charges 25$ per hour plus 50$ for a house call to repair home computers. make a table and a graph to show the cost for 1,2,3, and 4 hours of home computer repair service. is there a direct variation?

Answers

Answer:

75$

Step-by-step explanation:

because 25+50=75

Answer:

The graph starts at $75 since the price for call is $50 and 1 hour of work costs $25.

Direct variation is only noticeable at the beginning of the graph after that the function is linear.

Step-by-step explanation:

1.488 divided by 2.1 rounded to nearest tenth

Answers

The answer should be 0.70

Select the correct answer.What is the current value of a future sum of money called?
А.
current value
B.
present value
С. .
future value

Answers

Answer:

b. present money

Step-by-step explanation:

the concept that States an amount of money today is worth more than that sum amount in the future. future money is not worth much then the amount received today.

Answer is B, Present Value

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