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borishaifa [10]
3 years ago
13

I need help on number 1​

Mathematics
1 answer:
lesya [120]3 years ago
8 0

Answer:

y = -9

Step-by-step explanation:

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A shoe manufacturer collected data regarding men's shoe sizes and found that the distribution of sizes exactly fits the normal c
Lina20 [59]

Answer: 97.72%

Step-by-step explanation:

Given : A shoe manufacturer collected data regarding men's shoe sizes and found that the distribution of sizes exactly fits the normal curve.

Let x be the random variable that represents the shoe sizees.

Also, The population mean = \mu=11 ; Standard deviation: \sigma=1.5

Formula for z:-

z=\dfrac{x-\mu}{\sigma}

Put x= 8, we get

z=\dfrac{8-11}{1.5}=-2

Now, the probability that the male shoe sizes are greater than 8 :-

P(x>8)=P(z>-2)=1-P(z\leq-2)\\\\=1-0.0227501=0.9772499\approx0.9772

Hence, the percent of male shoe sizes are greater than 8 is 97.72%.

7 0
3 years ago
The Smith's dinner bill is $76.60. Mrs. Smith is going to leave a 20% tip. How much money will Mrs. Smith leave for the tip?
Diano4ka-milaya [45]

Answer:

She left a $15.32 tip

Step-by-step explanation:

20% of $76.60=

First find 10% of $76.60 (Divide it by 10)= $7.66

Multiply it by 2 = $15.32

7 0
4 years ago
HELP ASAP WILL GIVE FIRST PERSON BRAINLIEST
kaheart [24]

30 * 1/5 = 6  so 6 have a cell phone  

1/2 * 6 = 3 so 3 have a cellphone and social media


195 divide by 2 1/2

195 divide 5/2  (copy dot flip)

195 * 2/5

78 loads of laundry

19.99  divide by 78

.256

.26

he is paying 26 cents for each load

4 0
3 years ago
Identify the type of sampling (cluster, convenience, random, stratified, systematic) which would be used to get each of the foll
loris [4]
A) systematic
B) cluster
C) stratified
D) convenience
E) random

If you need explanation, just let me know!
6 0
3 years ago
$850 at 8% for 8 years, compounded annually.
pochemuha
A=P(1+r)^t
r=rate in decimal
A=future amount
P=present amount
t=time in years


A=850(1+0.08)^5
A=850(1.08)^5
A=1573.29


6 0
3 years ago
Read 2 more answers
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