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2 years ago

Write in expanded form. Use parentheses to indicate multiplication.

Mathematics

1 answer:

Mashutka [201]2 years ago

5 0

Answer:

Yung utak mo sabog hahahaha

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Identify the surface with the given vector equation. r(s, t) = s sin 4t, s2, s cos 4t

k0ka [10]

Answer:

Circular paraboloid

Step-by-step explanation:

Given ,

$r(s,t)=ssin4t,s^2,scos4t$

Here, these are the respective $x,y,z$ axes components.

Component along x axis $r_i : ssin4t$

Component along y axis $r_j : s^2$

Component along z axis $r_k : scos4t$

We see that , from the parameterised equation , $r_i^2+r_k^2=s^2sin^24t+s^2cos^24t\\r_i^2+r_k^2=s^2\\r_i^2+r_k^2=r_j$

This can also be written as :

$x^2+z^2=y$

This is similar to an equation of a parabola in 1 Dimension.

By fixing the value of z=0,

We get $y=x^2$ which is equation of a parabola curving towards the positive infinity of y-axis and in the x-y plane.

By fixing the value of x=0,

We get $y=z^2$ which is equation of a parabola curving towards positive infinity of y-axis and in the y-z plane.

Thus by fixing the values of x and z alternatively , we get a CIRCULAR PARABOLOID.

4 0

3 years ago

Parallelogram ABCD is similar to parallelogram QRST

k0ka [10]

Answer:

2. reflect parrellelogram ABCD across the x-axis and dilate the result by a scale factor of two centered at the orgigin

Step-by-step explanation:

to correctly map the parallelograms together you need to dialate the shape, because we already know that its two times bigger

7 0

2 years ago

PLZ HELP IWILL GIVE BRAINLIESTTT

liq [111]

Answer:

Choice B

A = b x h

Step-by-step explanation:

In other words the area of a parallelogram is the base times height

8 0

2 years ago

Does anyone know this one?

erastova [34]

The answer is C, you double 8 million and then double 16 million

4 0

2 years ago

In order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estim

Sonja [21]

Answer:

Step-by-step explanation:

Given that in order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estimating the average time it takes to install tile flooring.

Std deviation =4.5 errors

95% confidence interval = Mean±1.96*std dev

Hence we have

$1.96(\frac{4.5}{\sqrt{n} } )$

$\sqrt{n} \geq 4.41\\n\geq 19.4481$

Sample size should be 20.

8 0

2 years ago