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Nimfa-mama [501]
3 years ago
13

Adam celebrated his eighteenth birthday with friends at a Chinese restaurant. The bill came to $287.69 without tax. The service

was quite good so he decided to tip the waiter 20 percent.What is the amount of tip that Adam and his friends should leave for the waiter?
Mathematics
1 answer:
blsea [12.9K]3 years ago
5 0
To find the percent. A trick I learned in middle school was Dr. P

To turn a decimal to a percent and a percent to decimal... (look at picture)

Using that trick...

All you do is multiply $287.69 by .20

Which gives you $57.538 so you can round to either...

$57.54
Or
$57.50
Or
$58

And one of those are your answer!
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A lumber company is making boards that are 2920.0 millimeters tall. If the boards are too long they must be trimmed, and if the
Effectus [21]

Answer:

The value of the test statistic is of 0.22.

Step-by-step explanation:

Our test statistic is:

t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the expected mean, \sigma is the standard deviation(square root of the variance) and n is the size of the sample.

A lumber company is making boards that are 2920.0 millimeters tall.

This means that \mu = 2920.

A sample of 12 is made, and it is found that they have a mean of 2922.7 millimeters with a variance of 121.00.

This means that X = 2922.7, n = 12, \sigma = \sqrt{121} = 11. So

t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

t = \frac{2922.7 - 2922}{\frac{11}{\sqrt{12}}}

t = 0.22

The value of the test statistic is of 0.22.

4 0
3 years ago
PLEASE HELP. Will pick branliest!
Eddi Din [679]

Answer:

WZ=4

Step-by-step explanation:

2/5=x/10

cross multiply

20=5x

x=4

5 0
3 years ago
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he time spent dancing (minutes) and the amount of calories burned can be modeled by the equation c = 5.5t. Which table of values
Vladimir [108]

the image option 3 would be it


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the ratio of boys to girls in a classroom is 7:5 4 boys are added to the class the ratio is now 1:1 find the total number of gir
OLEGan [10]

Answer:

14

Step-by-step explanation:

7/5. = x/ x- 4 (the ratio to each other is the same)

cross multiply

7x-28 = 5x

simplified: -2x = -28

divide x and -28 by -2

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7 0
3 years ago
What is the value of x?
Vilka [71]

Answer:

x = 58

Step-by-step explanation:

The angle formed by two secants = 1/2(difference of intercepted arcs)

51 = 1/2 (160 - x)

Multiply each side by 2

51*2 = 2*1/2 (160-x)

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102-160 = 160-160-x

-58 = -x

Multiply each side by -1

58 =x

6 0
3 years ago
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