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NikAS [45]
3 years ago
11

How to Solve S=2(pi)rh for pi

Mathematics
1 answer:
Kruka [31]3 years ago
3 0
2x<span>3.14xrxh= answer, theres different types to get the answer there is 2(pi)r^2</span>
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The equation K = mv2 represents the energy an object has based on its motion. The kinetic energy, K, is based on the mass of the
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<span>The answer is She should have multiplied by 2 instead of dividing by 2.
First one.</span>
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3 years ago
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Question 1 :<br><br> what means to make a fraction as simple as possible? we also call it reducing.
Diano4ka-milaya [45]
This means making the fraction reduced to its lowest term
example= 
make the fraction 18xz/4z simpler
the z cancels each other making it remaining 18x/4
2 can go in x as in 18
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3 years ago
Given: KLMN is a trapezoid m∠N = m∠KML ME ⊥ KN , ME = 3√5 , KE = 8, LM:KN = 3:5 Find: KM, LM, KN, Area of KLMN
lora16 [44]
Q1)Find KM
As ME is perpendicular to KN, ∠KEM is a right angle
Therefore ΔKEM is a right angled triangle 
KE is given and and ME is also given, we need to find KM
for this we can use Pythogoras' theorem where the square of hypotenuse is equal to the sum of the squares of the adjacent sides.
KM² = KE² + ME²
KM² = 8² + (3√5)²
       = 64 + 9x5
KM = √109
KM = 10.44

Q2)Find LM
It is said that ratio of LM:KN is 3:5
Therefore if we take the length of one unit as x
length of LM is 3x
and the length of KN is 5x
KN is greater than LM by 2 units 
If we take the figure ∠K and ∠N are equal. 
Since the angles on opposite sides of the bases are equal then this is called an isosceles trapezoid. So if we draw a line from L that cuts KN perpendicularly at D, ΔKEM and ΔLDN are congruent therefore KE = DN
since KN is greater than LM due to KE and DN , the extra 2 units of KN correspond to 16 units 
KN = LM + 2x 
2x = KE + DN
2x = 8+8
x = 8
LM = 3x = 3*8 = 24

Q3)Find KN 
Since ∠K and ∠N are equal, when we take the 2 triangles KEM and LDN, they both have;
same height ME = LD perpendicular distance between the 2 parallel sides 
same right angle when the perpendicular lines cut KN
∠K = ∠N 
when 2 angles and one side of one triangle is equal to two angles and one side on another triangle then the 2 triangles are congruent according to AAS theorem (AAS). Therefore KE = DN 
the distance ED = LM
Therefore KN = KE + ED + DN
 since ED = LM = 24
and KE + DN = 16
KN = 16 + 24 = 40
another way is since KN = 5x and x = 8
KN = 5 * 8 = 40

Q4)Find area KLMN
Area of trapezium can be calculated using the following general equation 
Area = 1/2 x perpendicular height between parallel lines x (sum of the parallel sides)
where perpendicular height - ME
2 parallel sides are KN and LM
substituting values into the general equation
Area = 1/2 * ME * (KN+ LM) 
         = 1/2 * 3√5 * (40 + 24)
         = 1/2 * 3√5 * 64
         = 3 x 2.23 * 32
         = 214.66 units²


8 0
3 years ago
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Nate has $50 to spend at the grocery store. he fills his shopping cart with items totaling $46. At checkout he will have to pay
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Answer:

yes he can

Step-by-step explanation:

he has to pay total is :   46+46x6%=48.76$

so he can pay that

8 0
3 years ago
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What is u equal to u=?
Jet001 [13]

Answer:

u= -449

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<u>+366              +366</u>

1080=6u+3774

<u>-3774      -3774</u>

6u=-2694

<u>÷6   ÷6</u>

u=-449

6 0
3 years ago
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