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jonny [76]
4 years ago
12

A scientist has a hypothesis that as the number of police cars is increased on a roadway, the proportion of cars speeding decrea

ses. He finds that at police car level X1 (one police car per 100 miles), the proportion of cars speeding is p hat equals 0.83. At police car level X2 (one police car per 50 miles), the proportion of cars speeding is p hat equals 0.61. At police car level X3 (one police car per 25 miles), the proportion of cars speeding is p hat equals 0.39. Should the hypothesis be rejected or should it fail to be rejected?
Mathematics
2 answers:
guajiro [1.7K]4 years ago
7 0
Yes it shrunk 

<span>yes the cars has been shrunk and are not able to reject because the could just stand up and walk of without rejecting unless they are in a helicopter they have to find a landing spot to do so and if they are in a train they need to  pull the brakes if the brakes dont work the have to jump out and roll in rocks or grass and if they are</span>
Katarina [22]4 years ago
4 0
It is a the police car level x2
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Find the product of the complex numbers (-5+ 8i) and (3 - 8i)
Liula [17]

Answer: 49+64i

Step-by-step explanation:

Concept to know:

i=√-1

i²=-1

i³=-i

i^{4}=1

-------------------------------------

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=-15+40i+24i-64i²

=-15+64i-64i²

=-15+64i+64  (remember, i²=-1)

=49+64i

Hope this helps!! :)

Please let me know if you have any question or need further explanation

7 0
3 years ago
Describe how to transform:
Anna71 [15]

Answer:

x^\frac{35}{6}

Step-by-step explanation:

The expression to transform is:

(\sqrt[6]{x^5})^7

Let's work first on the inside of the parenthesis.

Recall that the n-root of an expression can be written as a fractional exponent of the expression as follows:

\sqrt[n]{a} = a^{\frac{1}{n}}

Therefore \sqrt[6]{a} = a^{\frac{1}{6}}

Now let's replace a with x^{5} which is the algebraic form we are given inside the 6th root:

\sqrt[6]{x^5} = (x^5)^{\frac{1}{6}}

Now use the property that tells us how to proceed when we have  "exponent of an exponent":

(a^n)^m= a^{n*m}

Therefore we get:  (x^5)^{\frac{1}{6}}=x^{\frac{5}{6}}}

Finally remember that this expression was raised to the power 7, therefore:

[tex](\sqrt[6]{x^5})^7=(x^\frac{5}{6})^7=x^\frac{35}{6}[/tex]

An use again the property for the exponent of a exponent:

8 0
3 years ago
I went shopping for a pencil case with the entire script of shrek with an onion zipper, which costed 2.50$ each pencil case. I h
scZoUnD [109]

Answer:

40 pencil cases

Step-by-step explanation:

To find out how many $2.50 pencil cases you can buy with $100, you need to divide. Dividing the amount of money you have by the cost of the item will get you the amount of items you can buy. 100 divided by 2.50 is 40. So, you can get 40 cases.

4 0
3 years ago
Joseph has 66 books, Gilda has 31 books, and Mark has twice the number of books that Gilda has. How many books do they have toge
mihalych1998 [28]
66 (Joseph's books) +31 (Gilda's books) +31 (Mark's books)= 128 Number of books all together.
4 0
3 years ago
WHY is -2 3 8l9 1,476 -6.01 all rational numbers . have a separate explanation for each number
Ivahew [28]
There really doesn't need to be a separate explanation for each number because 1 explanation would explain everyone of them.

All of these numbers are rational because a rational number is, or can be, turned into a fraction.

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819 = 819/1
1,476 = 1,476/1
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5 0
3 years ago
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