I need help please ! I do not get this /:

The tires on Pablo's bicycle have a radius of 10 inches. Use the appropriate formula model to find the circumference. What is th

Scrat [10]

C= 2 x pi x radius
20 x pi
=62.831853.....
to the nearest 10th, this is 63. so the answer is 63 inches.

3 0

4 years ago

Select proportional or not proportional to correctly classify the pair of ratios. 1.2/3 and 1.8/4.5

Gnesinka [82]

Answer:

Proportional.

Step-by-step explanation:

Find the cross products. If they are same, then they are proportional.

$\dfrac{1.2}{3} = \dfrac{1.8}{4.5}$

Cross multiply,

1.2 * 4 .5 = 3*1.8

5.40 = 5.4

So, they are proportional.

Or

Multiply the numerator and denominator of 1.2/3 by 1.5

$\dfrac{1.2*1.5}{3*1.5}=\dfrac{1.8}{4.5}$

From this we come to know they are proportional

Or

1.2 : 3 :: 1.8 : 4.5

Product of means = 3*1.8 = 5.4

Product of extremes = 1.2*4.5 = 5.4

Product of means = product of extremes. So, they are proportional.

6 0

2 years ago

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A Rectangle with sides 100m and 50m. Person B and Person A start walking in the opposite direction at the same point with veloci

Maurinko [17]

Answer:

It takes takes them 31.67 secs to meet after Person A starts walking

OR

34.67 secs after Person B starts walking

Step-by-step explanation:

First, we will find the perimeter of the rectangle

From,

Perimeter of rectangle = 2 ( $l$ + $b$ )

Where $l$ is the length

and $b$ is the breadth

From the question, $l$ = 100m

and $b$ = 50m

Hence,

Perimeter of the rectangle = 2 (100+50)

= 2(150) = 300m

Hence, the perimeter of the rectangle is 300m

This is the total distance that will be covered by both persons by the time they meet.

Let the distance covered by person A be $S_{1}$

and the distance covered by person B be $S_{2}$

We can write that

$S_{1}$ + $S_{2}$ = 300m

Velocity of person A, $V_{A}$ = 4 m/s

and velocity of person B, $V_{B}$ = 5 m/s

From the question, Person A starts walking 3 seconds after person B,

This means, if person A spends $t$ secs before they meet, then person B would spend (3 + $t$ ) secs.

For Person A,

Velocity = 4 m/s

Time = $t$ secs

Distance = $S_{1}$

From,

$Velocity = \frac{Distance}{Time}$

Then,

$Distance = Velocity \times time$

$S_{1} = 4 \times t$

$S_{1} = 4t$ ...... (1)

For Person B

Velocity = 5 m/s

Time = (t + 3) secs

Distance = $S_{2}$

Also, from

$Distance = Velocity \times time$

$S_{2} = 5 \times (3+t)$

$S_{2} = 5(3+t)$ ...... (2)

Recall that, $S_{1}$ + $S_{2}$ = 300m

Then, $S_{2}$ = 300m - $S_{1}$

We can then write that,

300m - $S_{1}$ $= 5(3+t)$

Then,

$S_{1} = 300 - 5(3+t)$ ..... (3)

Equating equations (1) and (3), we get

$300 - 5(3+t) = 4t$

$300 - 15 -5t = 4t\\9t = 285\\t = \frac{285}{9}\\$

$t = 31.67 secs$

This is the time spent by Person A

Hence, it takes takes them 31.67 secs to meet after Person A starts walking OR

34.67 secs after Person B starts walking

3 0

3 years ago

Are you picky about the toilet paper you buy? James is! To investigate the absorbency power of his favorite

Zolol [24]

There's no convincing evidence at 0.05 significance level that this brand of toilet paper will require less than 26 squares.

<h3>What is a significance level?</h3>

A significance level simply means is the probability that an event has occured by chance.

In this case, there's convincing evidence at 0.05 significance level that this brand of toilet paper will require less than 26 squares to absorb 1/4 cup of water. Therefore, we fail to reject the null hypothesis.

A type of error that may have been made is type II error. This is the non rejection if the null hypothesis when it's false.

Learn more about significance level on:

brainly.com/question/9163177

5 0

2 years ago

Given two triangles with three corresponding angles that are congruent, why can't the two triangles be proved congruent? A) Give

Xelga [282]

The answer is the triangles could have the same shape( that is all the angles are equal) but the sides may not be the same length . Thay are similar but not necessarily congruent.

C is the correct choice.

6 0

3 years ago

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