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2 years ago

11

Write each percent as a fraction in simplest form? 1. 75%

1 answer:

dem82 [27]2 years ago

5 0

Answer:

3/4

Step-by-step explanation:

As a decimal, 75% is 0.75, which is 3/4

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Frank and Francis are building houses in a computer game . Frank started with 630 bricks and is using his bricks at a rate of 15

nadya68 [22]

Francis because when you put Franks into an equation it is 630-15x=y and you have to make the x = 20 so you multiply 15 by 20 to get 300 then you subtract 300 from 630 to get 330. And on Francis' graph it shows that she has 320 left so Francis has less. Hope that helps!!

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2 years ago

The functions show two sister's savings accounts and rate at which they plan to deposit money

velikii [3]

Answer:

dana had a greater initial value.

Step-by-step explanation:

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2 years ago

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(3n + 2)(n+3) I just need the answer ASAP<br><br><br><br><br><br><br>

Ainat [17]

Answer:

3n^2=11n=6

Step-by-step explanation:

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2 years ago

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In a sample of 60 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2. Section 05.01 Ex

jasenka [17]

Answer:

95% confidence interval for the mean efficiency is [84.483 , 85.517].

Step-by-step explanation:

We are given that in a sample of 60 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2.

So, the pivotal quantity for 95% confidence interval for the population mean efficiency is given by;

P.Q. = $\frac{\bar X - \mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\mu$ = sample average efficiency = 85

$\sigma$ = sample standard deviation = 2

n = sample of motors = 60

$\mu$ = population mean efficiency

<em>So, 95% confidence interval for the mean efficiency, </em> $\mu$ <em> is ;</em>

P(-2.0009 < $t_5_9$ < 2.0009) = 0.95

P(-2.0009 < $\frac{\bar X - \mu}{\frac{s}{\sqrt{n} } }$ < 2.0009 ) = 0.95

P( $-2.0009 \times {\frac{s}{\sqrt{n} }$ < ${\bar X - \mu}$ < $2.0009 \times {\frac{s}{\sqrt{n} }$ ) = 0.95

P( $\bar X -2.0009 \times {\frac{s}{\sqrt{n} }$ < $\mu$ < $\bar X +2.0009 \times {\frac{s}{\sqrt{n} }$ ) = 0.95

<u>95% confidence interval for</u> $\mu$ = [ $\bar X -2.0009 \times {\frac{s}{\sqrt{n} }$ , $\bar X +2.0009 \times {\frac{s}{\sqrt{n} }$ ]

= [ $85 -2.0009 \times {\frac{2}{\sqrt{60} }$ , $85 +2.0009 \times {\frac{2}{\sqrt{60} }$ ]

= [84.483 , 85.517]

Therefore, 95% confidence interval for the population mean efficiency is [84.483 , 85.517].

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2 years ago

Joey has a box with 40 football and 120 baseball cards. Sylvia has a box with 75 football and 100 baseball cards. Joey randomly

Elodia [21]

B. Joey and Sylvia selected their cards randomly

right on plato, 100% :)

3 0

2 years ago