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3 years ago

5

Help pleaseeeeeee :)

2 answers:

Nikitich [7]3 years ago

7 0

Wouldn't it be 3pie x pie/4 = r

Serhud [2]3 years ago

7 0

Can a radius be in degrees?

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What is the following number in decimal form?

belka [17]

The correct answer is b

7 0

3 years ago

You decide to enter in a rowing competition. To train, you go to the boat house and begin rolling down stream. You row for the s

fredd [130]

Answer:

Time spent rowing down stream $=100\ seconds$

Speed of boat in still water $=14\ ms^{-1}$

Step-by-step explanation:

Let speed of boat in still water be $= x\ ms^{-1}$

Speed of current $= 10\ ms^{-1}$

Speed of boat down stream = $\textrm{Speed of boat in still water +Speed of current}= (x+10)\ ms^{-1}$

Distance rowed down stream = 2400 m

Time spent rowing down stream = $\frac{Distance}{Speed}=\frac{2400}{x+10}\ s$ = $\frac{Distance}{Speed}=\frac{2400}{x+10}\ s$

Speed of boat up stream = $\textrm{Speed of boat in still water -Speed of current}= (x-10)\ ms^{-1}$

Distance rowed up stream = $\frac{1}{6} \textrm{ of distance rowed downstream}=\frac{1}{6}\times 2400 = 400\ m$

Time spent rowing up stream = $\frac{Distance}{Speed}=\frac{400}{x-10}\ s$

We know that,

$\textrm{Time spent rowing down stream =Time spent rowing up stream}$

So,

$\frac{2400}{x+10}=\frac{400}{x-10}$

Cross multiplying

$2400(x-10)=400(x+10)$

Dividing both sides by $400$

$\frac{2400(x-10)}{400}=\frac{400(x+10)}{400}$

$6(x-10)=x+10$

$6x-60=x+10$

Adding 60 to both sides.

$6x-60+60=x+10+60$

$6x=x+70$

Subtracting both sides by $x$

$6x-x=x+70-x$

$5x=70$

Dividing both sides by 5.

$\frac{5x}{5}=\frac{70}{5}$

∴ $x=14$

Speed of boat in still water $=14\ ms^-1$

Time spent rowing down stream = $\frac{2400}{14+10}=\frac{2400}{24}=100\ s$

3 0

3 years ago

The diameter of a baseball is approximately 3 inches. what is its volume?

Arada [10]

Answer:

About 14.14

Step-by-step explanation:

V = 4/3pi x r^3

To find the radius, divide the diameter by 2 (1.5)

Substitute 1.5 in place of r and solve the equation.

4 0

3 years ago

Read 2 more answers

Choose all that state the correct unit rate for each situation. 100 POINTS ASAP K12

Lorico [155]

Answer:

Please see the answers below:

Step-by-step explanation:

The wrong answers are deleted only the correct answers are listed below:

Ryan earns $45 for 5 hours of work. The unit rate is $9 for 1 hour.

Jenna can drive her car 110 miles on 5 gallons of gasoline. The unit rate is 22 miles per gallon.

Claire saves $320 in 16 weeks. The unit rate is $20 per week.

% increase in price of gas = [(New Price - Original Price) / Original Price] x 100

% increase in price of gas = [($2.48 - $2.18) / $2.18] x 100

% increase in price of gas = [$0.3 / $2.18] x 100

% increase in price of gas = 13.76%

7 0

3 years ago

F(x) = x² + 6x+8<br> What is the vertex

Dominik [7]

Answer:

(-3,-1)

Step-by-step explanation:

7 0

3 years ago