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Drupady [299]
3 years ago
13

On a recent quiz, the class mean was 70 with a standard deviation of 2.1. Calculate the z-score (to 4 decimal places) for a pers

on who received score of 76.
Mathematics
1 answer:
Igoryamba3 years ago
5 0
The equation to find a z score is (x- mean)/(standard deviation)

So, in this case the equation would be
(76-70)/(2.1)

For,
X=76
Mean=70
Standard Deviation= 2.1

After solving we find that the z score equals 2.85714

or

2.8571

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the cost of a ticket t to a concert with a 3% sales tax can be represented by the expression t+0.03t. simplify the expression. t
Brilliant_brown [7]
72.00 x 3% = 2.16
72.00 + 2.16 = 74.16 total
7 0
3 years ago
The ratio of red marbels to blue marbles in a bag is 3:4 which of the following is a possible total number of marbels
nadya68 [22]
If that helps, but I'm pretty sure the answer is -1 that is what I have found in Google that is what all the answers are that in finding.

3 0
3 years ago
"If a Japanese toy costs 20 yen and the yen per dollar exchange rate is​ 5, what is the dollar price of the Japanese​ toy?"
lapo4ka [179]
<h2>Answer:</h2>

The dollar price of the Japanese​ toy is: $ 4.

<h2>Step-by-step explanation:</h2>

Exchange rate--

It the value of currency of one country in term's of the currency of the other country.

Here it is given that:

The yen per dollar exchange rate is​ 5.

This means that:

 5 yen= $ 1

This means that:

(5×4) yen=$ (1×4)

i.e.

20 yen=$ 4

Now the cost of Japanese toy is: 20 yen

<em>Hence, the cost of the Japanese toy in dollars is: $ 4.</em>

4 0
3 years ago
Victoria and her children went into a movie theater and will buy bags of popcorn and candies. Each bag of popcorn costs $8.50 an
shtirl [24]

Answer:she has $60.25 left...I think

Step-by-step explanation:

8 .50 + 3.25= 11.75

72 - 11.75 = 60.25

4 0
3 years ago
Roumd 33 to the nearest 100​
storchak [24]

Answer:

Step-by-step explanation:

Trick question. Good to know.

0 is the closest 100.

33 will round to 0

6 0
4 years ago
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