1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
MakcuM [25]
3 years ago
7

Two gears are connected and are rotating simultaneously. The smaller gear has a radius of 3 inches, and the larger gear has a ra

dius of 7 inches.
Part 1: What is the angle measure, in degrees and rounded to the nearest tenth, through which the larger gear has rotated when the smaller gear has made one complete rotation?

Part 2: How many rotations will the smaller gear make during one complete rotation of the larger gear?

Show all work.
Mathematics
1 answer:
Dovator [93]3 years ago
6 0
Circumference of a circle is C = 2πr.

part 1)

so the radius of the smaller gear is 3 inches, so after a full rotation, namely a revolution, the smaller gear has covered an arc of 2π(3), or 6π.

what angle has the larger gear of 7 inches in radius, has it covered with an arc of 6π?

\bf \textit{arc's length}\\\\
s=r\theta ~~
\begin{cases}
r=radius\\
\theta =angle~in\\
\qquad radians\\
------\\
s=6\pi \\
r=7
\end{cases}\implies 6\pi =7\theta \implies \cfrac{6\pi }{7}=\theta



part 2)

since the larger gear has a radius of 7, in a revolution it will have an arc of 2π(7), or 14π.

now, we know the smaller gear does a 6π arc in a revolution, how many revolutions will it do in an arc of 14π?

\bf \begin{array}{ccll}
arc&revolution\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
6\pi &1\\
14\pi &x
\end{array}\implies \cfrac{6\pi }{14\pi }=\cfrac{1}{x}\implies \cfrac{3}{7}=\cfrac{1}{x}\implies x=\cfrac{7}{3}
You might be interested in
We just saw an example of "Survival of the fittest" with the rabbits that survived. We often use this as an expression to descri
GarryVolchara [31]

Answer:

If only the fittest survive in certain enviorments other animals have to evolve to live in different places

Step-by-step explanation:

3 0
2 years ago
Evaluate the expression w 2 - v + 1 for w = -2 and v = -8.
Aleksandr [31]

Answer:

Is the w2, w(2) or

{w}^{2}

?

If it's w(2) the answer is -4--8+1=-4+8+1=5

if it's w^2 then the answer would be 4--8+1=4+8+1=13

4 0
2 years ago
¿Cuántos litros de agua se precisa para llenar una piscina inflable de 1/4 de metro cúbico?
8_murik_8 [283]

Answer:

250 litters

Step-by-step explanation:

To solve this question, we first need to know the conversion from cubic meter to liter.

1 cubic meter is equal to 1000 liters.

So, if we have 1/4 cubic meter, we can use a rule of three to find how many liters we will need:

1 m3 -> 1000 L

1/4 m3 -> x L

x * 1 = (1/4) * 1000

x = 1000 / 4 = 250 L

So we need 250 liters of water.

6 0
3 years ago
A T-shirt that usually cost $32 is on sale 1/4 off.What is the sale price??
olya-2409 [2.1K]
32/4 = 8
32 - 8 = 24 $
3 0
3 years ago
Read 2 more answers
Estimate the area of the circle.
mariarad [96]

Answer:

4

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • An ice cream shop sold 48 vanilla milkshake in a day which is 40% of the total number of milkshake sold that day.What was the to
    5·1 answer
  • Convert 16/5 to a decimal
    13·2 answers
  • The standard deviation for a set of data is 7.5. The mean is 235. What is the margin of error?
    8·2 answers
  • Sue had $100.00 in her wallet. She spent 23% of that money on notebooks and folders how much money did she spent?
    14·2 answers
  • Find the surface area of the figure.<br> 3 m<br> m<br> 5 m<br> 7m
    12·1 answer
  • A box contains 48 snack-sized bags of popcorn.
    11·1 answer
  • If a=5,b=-4 and c=-3,what is the value of 2a-6b+3c?<br><br> _____
    14·2 answers
  • QUESTION ON PIC‼️❓THX
    15·1 answer
  • The Burger Joint expects to serve 250 hamburgers on Saturday evening. Each hamburger weighs 6
    6·1 answer
  • As indicated below, write the equations of the line passing through the point (2, 4) and parallel to the line whose equation is
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!