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
MA_775_DIABLO [31]
2 years ago
14

Find the perimeter of this semi-circle with diameter, d = 39cm. Give your answer rounded to 1 DP.

Mathematics
1 answer:
deff fn [24]2 years ago
3 0

Answer:

p=1/2*3.14+d

1/2*3.14*19.5=30.615

=30.615+39

=69.615

=69.6

Step-by-step explanation:

since it's half a circle we take the formula of acricle to be half

You might be interested in
SOS ANSWERRRRR PLZZZZZ
Karo-lina-s [1.5K]
The answer would be A 20c/d
7 0
2 years ago
PLEASE PLEASE HELP PLEASE
kogti [31]

Answer:

r = 6

Step-by-step explanation:

Using Pythagoras' identity in the right triangle

PR² = PQ² + QR² , substitute values

(r + 4)² = r² + 8²

r² + 8r + 16 = r² + 64 ( subtract r² from both sides )

8r + 16 = 64 ( subtract 16 from both sides )

8r = 48 ( divide both sides by 8 )

r = 6

3 0
2 years ago
A decimal that would be more than a half
Reika [66]

Answer:

So basically anything higher than .5 would be x>.5  so it has to be greater than or equal to .51

Step-by-step explanation:

.51  .75   .89   .56   .78   .86 .61    it goes on and on as long as it is greater than .50

4 0
2 years ago
The function f(x) = x2 + 10x – 3 written in vertex form is f(x) = (x + 5)2 – 28. What are the coordinates of the vertex?
Alexxandr [17]
Vertex form uses the following formula:

y = a(x-h)^2 + k

Identify the values of h and k in your function:

(x+5)^2 - 28
h = -5, k = -28

The vertex is found with the following point:

(h,k)
\text{Vertex: (-5, -28)}

The vertex will be found at (-5, -28).
4 0
3 years ago
The reading speed of second grade students in a large city is approximately normal, with a mean of 90 words per
kari74 [83]

Answer:

The probability that a random sample of 10 second grade students from     the city results in a mean  reading rate of more than 96 words per minute

P(x⁻>96) =0.0359

Step-by-step explanation:

<em>Explanation</em>:-

<em>Given sample size 'n' =10</em>

<em>mean of the Population = 90 words per minute</em>

<em>standard deviation of the Population =10 wpm </em>

<em>we will use formula</em>

<em>                            </em>Z = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }<em></em>

<em>Let X⁻  = 96</em>

                           Z = \frac{96-90 }{\frac{10}{\sqrt{10} } }

                          Z =  1.898

<em>The probability that a random sample of 10 second grade students from     the city results in a mean  reading rate of more than 96 words per minute</em>

<em></em>P(X^{-}>x^{-} ) = P(Z > z^{-} )<em></em>

<em>                    = 1- P( Z ≤z⁻)</em>

<em>                    = 1- P(Z<1.898)</em>

                   = 1-(0.5 +A(1.898)

                   = 0.5 - A(1.898)

                   = 0.5 -0.4641 (From Normal table)

                  = 0.0359

<u><em>Final answer</em></u>:-

The probability that a random sample of 10 second grade students from  

                = 0.0359

4 0
3 years ago
Other questions:
  • a baker has 20 pounds of sugar. He uses 3/4 of the sugar to bake muffins. How many sugar does he have left?
    8·1 answer
  • What is the 52nd term of the arithmetic sequence -8, -12, -16?
    13·1 answer
  • The winner of the cross-country meet ran 6 miles in 2 hour. What is the average speed per minute?
    9·2 answers
  • An engineer is standing 10 meters away from a building. When she looks up at the top of the building, she measures the angle fro
    9·1 answer
  • 40 POINTS! HELP! ASAP!
    12·1 answer
  • The 17 students on the math team wanted to raise $483.62 to buy practice books.they have already raised $218.25 if each student
    14·2 answers
  • colleen is searching online for tickets two weeks ago the cost to fly from orlando to hartford was 200$ . Now the cost is 335$ w
    5·2 answers
  • Are y=3/4x + 1 and 6x + 8y = 3 parallel or perpendicular ?<br><br>​
    11·1 answer
  • Tim has
    11·1 answer
  • Is it positive negative or none?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!