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3 years ago

Does anyone know how to do this ?

Mathematics

2 answers:

lubasha [3.4K]3 years ago

8 0

Answer:

see below

Step-by-step explanation:

Find the circumference

C = 2 * pi *r

C = 2(.23) * pi

C = .46pi

Since the wheel rotated 829 times, multiply the circumference by 829

829 * .46 pi

381.34 pi

If pi = 3.14

1197.4076 meters

If using the pi button

1198.01494 meters

Alexeev081 [22]3 years ago

3 0

Step-by-step explanation:

The circumference of a wheel is 0.46π, and we simply have to multiply that by 829 which is 381.34π or 1197.41.

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The maker of an automobile advertises that it takes 12 seconds to accelerate from 20 kilometers per hour to 65 kilometers per ho

sp2606 [1]

Answer:

The acceleration is 1.0416 m/ $s^{2}$

Step-by-step explanation:

In order to solve this problem we first need to know the formula for acceleration which is the following.

$acceleration = \frac{final.velocity - initial.velocity}{final.time - initial.time}$

Since the time acceleration is calculated as $m/s^{2}$ we need to convert the km/h into m/s. Since 1km = 1000m and 1 hour = 3600 seconds, then

$\frac{20*1000 }{3600s} = \frac{20,000m}{3600s} = \frac{20m}{3.6s}$

**Dividing numerator and denominator by 1000 to simplify**

$\frac{65*1000 }{3600s} = \frac{65,000m}{3600s} = \frac{65m}{3.6s}$

**Dividing numerator and denominator by 1000 to simplify**

Now we can plug in the values into the acceleration formula to calculate the acceleration.

$acceleration = \frac{\frac{65m}{3.6s}-\frac{20m}{3.6s} }{12s-0s}$

$acceleration = \frac{\frac{45m}{3.6s}}{12s}$

$acceleration = \frac{\frac{12.5m}{s}}{12s}$

$acceleration = \frac{\frac{1.0416m}{s}}{s}$

Finally we can see that the acceleration is 1.0416 m/ $s^{2}$

8 0

3 years ago

2/9 divided by 9/1 what is it?

Sonbull [250]

Answer:

0.02469135802

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

PLEASE HELP! Last question on my quiz

ozzi

I’m srry h can’t really see the letters :/

5 0

3 years ago

a principal of $750 is invested in an account at 9% per year simple interest. what is the account total after 5 years

trapecia [35]

The answer is 377.5, you would times 750 by 9%. Whatever the answer to the equation is, you take the answer and times that by 5.

8 0

3 years ago

Pleaseeeee helpppppppppp

statuscvo [17]

Answer:

1) 15ft

2) 21m

Step-by-step explanation:

1) 10ft/4ft = x/6ft

multiply both sides by 6

$\frac{10}{4} \times 6 = \frac{x}{6} \times 6$

60/4 = x

x= 15ft

2) 28m/x = 12m/9m

multiply both sides by 1/28

$\frac{28}{x} \times \frac{1}{28} = \frac{12}{9} \times \frac{1}{28}$

1/x = 12/252

1/x = 1/21

by equivalence, x= 21m

4 0

3 years ago