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MariettaO [177]
3 years ago
6

Fast-Food Bills for Drive-Thru Customers A random sample of 49 cars in the drive-thru of a popular fast food restaurant revealed

an average bill of $18.90 per car. The population standard deviation is $5.90. Estimate the mean bill for all cars from the drive-thru with 93% confidence. Use a graphing calculator and round the answers to at least two decimal places.
Mathematics
1 answer:
sergeinik [125]3 years ago
6 0

Answer:

sample mean:: 17.92

ME = z*s/sqrt(n) = 1.8807*6.35/sqrt(47) = 1.7421

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

Step-by-step explanation:

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Which fraction is equivalent to 0.16
777dan777 [17]

Answer:

\frac{4}{25}

Step-by-step explanation:

Decimal       Fraction       Percentage

0.16                  \frac{4}{25}                     16%

Think of it like this, by definition, decimals are already fractions, with their denominators being powers of 10.

0.16 = \frac{16}{100\\} ← there are 2 decimal places → 2 zeros

In simplest form,

\frac{16/4}{100/4} =  \frac{4}{25}

So, we get our answer to be;  \frac{4}{25}.

5 0
3 years ago
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Rewrite the equation by completing the square.<br> x2 – 2x + 1 = 0
Nikolay [14]

Answer:

Step-by-step explanation:

3 0
4 years ago
The interest on $2,000 for two years is $320 what is the simple interest rate.
Basile [38]

Answer:

$640

Step-by-step explanation:

im actually not too sure. i think thats right

4 0
3 years ago
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A kitchen supply outfit makes spoons and forks for sale. It costs the store $2 to buy the supplies needed to make a fork and $1
lana [24]

Given :

A kitchen supply outfit makes spoons and forks for sale. It costs the store $2 to buy the supplies needed to make a fork and $1 for the supplies to make a spoon. The store sells the forks for $4 and the spoons for $5.

Last month they spent $39 on supplies and sold all the forks and spoons they made using those supplies for $93.

To Find :

How many forks and spoons did the company make.

Solution :

Let, number of forks and spoons the company made are f and s.

For buying from the kitchen the equation is :

2f + s = 39    ....1)

For selling the equation will be :

4f + 5s = 93  ....2)

Multiplying equation 1) by 5 and subtracting equation 2) from it we get :

(10f + 5s) - ( 4f + 5s) = 195 - 93

6f = 102

f = 17  and s = 5

Therefore, the company make 17 forks and 5 spoons.

5 0
3 years ago
calculate the area of the kitchen if the outer wall with the window is 10 feet, the depth (height) of the kitchen is 7 feet, and
finlep [7]

Answer:

80 Ft²

Step-by-step explanation:

Area= length x width

length= 10 feet

width= 8 feet

A= 10 × 8

A= 80 Ft²

squared because it's feet multiplied by feet

Ft × Ft= Ft²

7 0
3 years ago
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