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3 years ago

Answers with work plz

Mathematics

1 answer:

Aleks04 [339]3 years ago

7 0

Answer:

15. 50.24

Step-by-step explanation:

pi times r squared

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Help me out and to the person reporting me Hi

irga5000 [103]

Answer:

Step-by-step explanation:

4 0

3 years ago

Gary invested $1,000 in a account earning interest at an annual rate of 5% compounded annually. Each year he deposited an additi

aalyn [17]

487 is the answer that I got

4 0

3 years ago

Hector would also like to see a professional sumo tournament while he is there, which would cost him ¥5,488. if the conversion r

Keith_Richards [23]

Based on the exchange rate and Victor's budget, hector can see the sumo tournament and have about $322 left over.

<h3>How to find cost of Victor's tournament?</h3>

Amount with Victor = $380

Conversion rate of US dollars to Japanese yen = 1 : 94.153

Cost of the trip = ¥5,488

Ratio of dollar to Yuan

1 : 94.153 = x : 5,488

1/94.153 = x / 5,488

cross product

1 × 5,488 = 94.153x

5,488 = 94.153x

x = 5,488 / 94.153

x = 58.2881055303601

Approximately,

x = $58

Amount left with Victor = Total money with Victor - amount spent

= $380 - $58

= $322

Learn more about ratio:

brainly.com/question/2328454

#SPJ4

8 0

2 years ago

Suppose y varies directly with x, and y = 12 when x = 2. What direct variation

neonofarm [45]

Answer:

$y=24$

Step-by-step explanation:

Given:

$y=kx$

Substitute:

$\left \{ {{y=12} \atop {x=2}} \right.$ into $y=kx$

$12=k\times2$

Swap the sides:

$k\times2=12$

Divide both sides of the equation by the coefficient of variable:

$k=\frac{12}{2}$

Cross out the common factor:

$k=6$

Find the equation of the function:

$y=6x$

Substitute:

$y=6\times4$

Calculate the product or quotient:

$y=24$

4 0

2 years ago

Jenna has bought a new hybrid car. Each week for a period of seven weeks, she has noted the fuel efficiency (in miles per gallon

Leviafan [203]

Answer: 0.82 miles per gallon

Step-by-step explanation:

Given : Jenna has bought a new hybrid car. Each week for a period of seven weeks, she has noted the fuel efficiency (x) (in miles per gallon) of her car.

The results are :45 44 43 44 45 44 43

The formula to find the standard deviation is given by :-

$\sigma=\sqrt{\dfrac{\sum_{i=1}^n(x_i-\overline{x})^2}{n-1}}$

First we find mean of the given data ,

$\overline{x}=\dfrac{\sum^n_{i=1}x_i}{n}\\\\=\dfrac{45+44+43+44+45+44+43}{7}=\dfrac{308}{7}=44$

Now,

${\sum_{i=1}^n(x_i-\overline{x})^2=(1)^2+(0)^2+(-1)^2+(0)^2+(1)^2+(0)^2+(-1)^2$

$=1+1+1+1=4$

Now, standard deviation of the above results will be :-

$\sigma=\sqrt{\dfrac{4}{7-1}}\\\\=\sqrt{\dfrac{4}{6}}\\\\=\dfrac{2}{\sqrt{3}}=0.816496580928\approx0.82$

Hence, the standard deviation of these results = 0.82 miles per gallon

8 0

3 years ago