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2 years ago

Solves 1.4 divided by 0.2 using the diagram at the right. is her reasoning correct explain

Mathematics

2 answers:

Finger [1]2 years ago

4 0

Answer: 1.4/0.2= 7

Step-by-step explanation:

think of it this way

14 divided by 2 equals 7

1 and 4 tenths divided by 2 tenths equal 7

maxonik [38]2 years ago

3 0

Answer:

the answer should be 7 !

Step-by-step explanation:

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The curves r1(t) = 2t, t2, t4 and r2(t) = sin t, sin 5t, 2t intersect at the origin. Find their angle of intersection, θ, correc

masya89 [10]

Answer:

Therefore the angle of intersection is $\theta =79.48^\circ$

Step-by-step explanation:

Angle at the intersection point of two carve is the angle of the tangents at that point.

Given,

$r_1(t)=(2t,t^2,t^4)$

and $r_2(t)=(sin t , sin5t, 2t)$

To find the tangent of a carve , we have to differentiate the carve.

$r'_1(t)=(2,2t,4t^3)$

The tangent at (0,0,0) is [ since the intersection point is (0,0,0)]

$r'_1(0)=(2,0,0)$ [ putting t= 0]

$|r'_1(0)|=\sqrt{2^2+0^2+0^2} =2$

Again,

$r'_2(t)=(cos t ,5 cos5t, 2)$

The tangent at (0,0,0) is

$r'_2(0)=(1 ,5, 2)$ [ putting t= 0]

$|r'_1(0)|=\sqrt{1^2+5^2+2^2} =\sqrt{30}$

If θ is angle between tangent, then

$cos \theta =\frac{r'_1(0).r'_2(0)}{|r'_1(0)|.|r'_2(0)|}$

$\Rightarrow cos \theta =\frac{(2,0,0).(1,5,2)}{2.\sqrt{30} }$

$\Rightarrow cos \theta =\frac{2}{2\sqrt{30} }$

$\Rightarrow cos \theta =\frac{1}{\sqrt{30} }$

$\Rightarrow \theta =cos^{-1}\frac{1}{\sqrt{30} }$

$\Rightarrow \theta =79.48^\circ$

Therefore the angle of intersection is $\theta =79.48^\circ$ .

8 0

2 years ago

Help me again please

mash [69]

Answer:

answer C (0,-9)

Step-by-step explanation:

the line passes through (0,-9)

6 0

2 years ago

How to do this question??

dusya [7]

I'm going to suppose that this is asking for the volume.
The formula to find volume for a cylinder is V= pi r 2(squared) h
The radius is 10cm and the height is 14cm
Then plug the numbers in
So you should get V=3.14 x 10(squared) x 14
The once you multiply all that you should get 4396 cm(cubed)

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2 years ago

Find S12 for the series 2 + 5 + 8 +...

olga55 [171]

2+5+8+11+14+17+20+23+26+29+32+35

4 0

3 years ago

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Car = V-8 sedan Years driven = first through third Miles driven = 14,000 miles each year In dollars and cents, the total project

saveliy_v [14]

Answer:

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