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lutik1710 [3]
3 years ago
10

At the doctor's office, there is a scale that measures people's weight. The needle is 20 cm long, and it rotated 100° when Frank

stepped on it. How far did the needle travel as it rotated
Mathematics
2 answers:
Deffense [45]3 years ago
5 0
This is asking you how far around that specific portion of the circle did the needle travel. I'm guessing you're in geometry and you're doing circle stuff right now.  This is the arc length. The formula is
l= \frac{central angle}{360} *2 \pi r
which is a combination of the circumference of a circle and its central angle.  Our situation will look like this:
l= \frac{100}{360} *2 \pi (20)
If you leave your answer in terms of pi it would be 11.1 \pi
or if you multiply it in, then your answer will be 34.9
lbvjy [14]3 years ago
5 0

the answer is 100pie over 9

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Question 5:
 the circumference is given by:
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 r: radio of the ball
 Substituting values we have:
 22 = 2 * pi * r
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The surface area of the balloon is:
 
A = 154 in ^ 2

 Question 8:
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option 3
4 0
3 years ago
Read 2 more answers
Nicole sold 1 cherry pie and 9 pumpkin pies for $60. Lisa sold 11 cheery pies and 4 pumpkin pies for $90. what's the cost each o
zubka84 [21]
X= cost per cherry pie
y= cost per pumpkin pie

NICOLE
1x + 9y= $60

LISA
11x + 4y= $90


STEP 1
multiply Nicole's equation by -11

-11(1x + 9y)= -11($60)
multiply -11 by all terms

(-11 * x) + (-11 * 9y)= (-11 * 60)

-11x - 99y= -660


STEP 2
add Nicole's new equation from step 1 to Lisa's equation to solve for y (using the elimination method)

-11x - 99y= -660
11x + 4y= 90
the x terms "cancel out"

-95y= -570
divide both sides by -95

y= $6 per pumpkin pie


STEP 3
substitute y value into either original equation to solve for x

x + 9y= $60

x + 9(6)= 60

x + 54= 60
subtract 54 from both sides

x= $6 per cherry pie


CHECK
11x + 4y= $90
11(6) + 4(6)= 90
66 + 24= 90
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ANSWER: Each cherry pie costs $6 and each pumpkin pie costs $6.

Hope this helps! :)
3 0
3 years ago
Help asap grade 5 math help fast help quick !!!
Alja [10]

Answer:

B and D

Step-by-step explanation:

A

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C

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D

\frac{10}{10} × 13 = 1 × 13 = 13

Band D are equal to or greater than 13

7 0
2 years ago
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