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kenny6666 [7]
3 years ago
6

one week she had 38 coins, all of them dimes and quarters. when she added them up, she had a total of 6.95, how many dimes did s

he have
Mathematics
2 answers:
Leona [35]3 years ago
6 0
65 is the highest so yeah hope it helps
Yuki888 [10]3 years ago
6 0
D+q=38, solve for q

q=38-d

And we are told that 25q+10d=695, using q found above we have;

25(38-d)+10d=695

950-25d+10d=695

-15d=-255

d=17

So she had 17 dimes.


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A store opens at 8am. From 8 until 10 customers arrive at a Poisson rate of four an hour. Between 10 and 12, they arrive at a Po
SVETLANKA909090 [29]

Answer:

The probability distribution of the number of customers that enter the store on a given day is:

P(x=k)=\frac{57^ke^{-57}}{k!}

Step-by-step explanation:

To calculate a parameter for the given day, we have to calculate what is the average arrival rate for the day.

This can be done with the data given:

1) From 10 to 12, 8 arrival/hour:  16 expected arrivals in this period

2) From 12 to 2, 8 to 12 arrival/hour (average: 10 arrivals): 20 expected arrivals in this period.

3) From 2 to 5, from 10 to 4 arrival/hour (average: 7 arrivals): 21 expected arrivals in this period.

The total expected arrivals in a day are: 16+20+21=57 arrivals/day.

Then, the probability distribution of the number of customers that enter the store on a given day is:

P(x=k)=\frac{57^ke^{-57}}{k!}

5 0
3 years ago
A bird drops a stick from the top of Miami Tower. The height of the stick after x seconds is given by f(x) = 625 - 16x^2.
Leni [432]

ANSWER

The maximum value is 625

EXPLANATION

The height of the stick that the bird dropped is modeled by the function;

f(x) = 625 - 16x^2

This function is already in the vertex form.

Let me rewrite it clearly for you to see.

f(x) = - 16(x - 0)^2 + 625

When we compare this to;

f(x)=a(x-h)^2+k

we have h=0 and k=625.

k=625 is the y-value of the vertex.

This is the maximum value on the graph of this function.

3 0
3 years ago
The base of a rectangle prism is 20 cm. If the height of the prism is 5 cm what is it volume
goldenfox [79]

Answer:

Answer : 100^3

Step-by-step explanation:

formula to find volume of prism =

v = base area * height

v = 20 * 5

v = 100

so , volume is 100^3

7 0
2 years ago
A trader needs $300000 to improve her business, she deposits $110000 in her savings account at 5% per annum compound interest. s
katrin [286]

<em>interpret it that there are three payments of 50,000 aside from the current deposit of 110,000</em>

<em>amount after 3 years</em>

<em>= 110,000(1.05)^3 + 50,000( 1.05^3 - 1)/.05</em>

<em></em>

4 0
2 years ago
A piggy bank contains 3 pennies, 4 nickels, 4 dimes and 9 quarters. Two coins
xeze [42]

Answer:

1325/10000

Explain Step By Step Answer

5 0
2 years ago
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