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vfiekz [6]
3 years ago
12

for the past 3 months, grace used her cell phone for 43 min, 62 min, and 57 min.how many minutes would she have to use her cel p

hone this month for the average usage over the four months to be 55 minuts
Mathematics
1 answer:
Irina18 [472]3 years ago
6 0
1357 divide 55 into 4
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Write -9.42 as a mixed number.
Savatey [412]

Answer:

-9 21/50

Step-by-step explanation:

5 0
3 years ago
3x - 5 = 1/2x + 2x solve the equation and please show your work im confused
Monica [59]

Answer:I searched it up on go

Step-by-step explanation:and I got 5x-5+ x/2

8 0
3 years ago
Find the area of the figure
Anna71 [15]

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4 and 1 over 4 divided by 1 and 7 over 8
allsm [11]

Answer:

3 and 23 Over 32

Step-by-step explanation:

Done

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8 0
2 years ago
A set of data has a normal distribution with a mean of 5.1 and a standard deviation of 0.9. Find the percent of data between 4.2
Yuliya22 [10]

A set of data has a normal distribution with a mean of 5.1 and a standard deviation of 0.9. Find the percent of data between 4.2 and 5.1.

Answer: The correct option is B) about 34%

Proof:

We have to find P(4.2

To find P(4.2, we need to use z score formula:

When x = 4.2, we have:

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

          =\frac{4.2-5.1}{0.9}=\frac{-0.9}{0.9}=-1

When x = 5.1, we have:

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

          =\frac{5.1-5.1}{0.9}=0

Therefore, we have to find P(-1

Using the standard normal table, we have:

P(-1= P(z

                               =0.50-0.1587

                               =0.3413 or 34.13%

                               = 34% approximately

Therefore, the percent of data between 4.2 and 5.1 is about 34%

7 0
3 years ago
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