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Marrrta [24]
3 years ago
10

Is it a function or not a function?

Mathematics
1 answer:
hichkok12 [17]3 years ago
4 0
Answer: It is a function.
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Assume that​ women's heights are normally distributed with a mean given by mu equals 63.2 in​, and a standard deviation given by
JulijaS [17]

a. Your answer is correct.

b. Divide the given value of sigma by √n where n = sample size = 7. Then perform the same calculation you did for part a. The probabiilty is 0.4427.

8 0
4 years ago
A fisherman can row upstream at 2 mph and downstream at 8 mph. He started rowing upstream until he got tired and then rowed down
slega [8]
<h3>Answer:    16 miles</h3>

==========================================================

Explanation:

x = time in hours spent going upstream

5-x = remaining time in hours spent going downstream

Those two quantities add to 5 hours total.

Let's find the expression for how far the fisherman went upstream

distance = rate*time

d = r*t

d = 2x

Do the same for the downstream portion

d = r*t

d = 8(5-x)

d = 40-8x

The values of d refer to the same distance because he came back to the starting point.

Set those right hand sides equal to one another and solve for x.

2x = 40-8x

2x+8x = 40

10x = 40

x = 40/10

x = 4

5-x = 5-4 = 1

He spent 4 hours going upstream, and the remaining 1 hour coming back downstream.

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

If he spent 4 hours going upstream at 2 mph, then he traveled d = r*t = 2*4 = 8 miles.

The remaining 1 hour going downstream at 8 mph means he traveled d = r*t = 8*1 = 8 miles, which matches with the previous result. This confirms we have the correct one-way distance of 8 miles.

Therefore, the total round trip distance is 2*8 = 16 miles

3 0
2 years ago
Lauren, Rachel and Becca started a business over the summer. Their income was $500. The girls put in different amounts of work,
zloy xaker [14]

Answer:

Step-by-step explanation: total income=$500

Ratio of partition of money6:3:4

( Which gives that lauren gets 6x, rachel gets 3x and Becca gets 4x)

6x+3x+4x=500

13x=$500

X=500/13 ( transposition method)

x= 38.46

So lauren gets 6(38.46)… rachel gets 3(38.46)while Becca gets 4(38.46)…

Lauren= 230.76

Rachel=115.38

Becca= 153.84

3 0
3 years ago
What is the perimeter?
tamaranim1 [39]

Answer:

21.3 unit

Step-by-step explanation:

side CB=\sqrt{(7^{2})+(2^{2})} =\sqrt{53}\\side CA=\sqrt{(5)^{2}+(2^{2})} =\sqrt{29}  \\side AB=\sqrt{(5^{2} )+(7^{2} )} =\sqrt{74}

Perimeter=\sqrt{53} +\sqrt{29} + \sqrt{74} =21.2676 unit

8 0
3 years ago
A car is 180 inches long. A truck is 75% longer than the car. How long is the truck?
Paul [167]

Answer:

315 inches

Step-by-step explanation:

Do 0.75 * 180 to find 75% of 180. This is 135.

Now add 135 to 180 to get 315. This is your answer.

4 0
3 years ago
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