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notsponge [240]

2 years ago

14

You find an object made of pure metal. What could you do to identify what type of metal the object is made of?How do you find de

nsity?

1 answer:

pantera1 [17]2 years ago

3 0

Answer:

by the texture and will need volume and mass to find density

Step-by-step explanation:

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You are given the parametric equations x=2cos(θ),y=sin(2θ). (a) List all of the points (x,y) where the tangent line is horizonta

vladimir1956 [14]

Answer:

The solutions listed from the smallest to the greatest are:

x: $-\sqrt{2}$ $-\sqrt{2}$ $\sqrt{2}$ $\sqrt{2}$

y: -1 1 -1 1

Step-by-step explanation:

The slope of the tangent line at a point of the curve is:

$m = \frac{\frac{dy}{dt} }{\frac{dx}{dt} }$

$m = -\frac{\cos 2\theta}{\sin \theta}$

The tangent line is horizontal when $m = 0$ . Then:

$\cos 2\theta = 0$

$2\theta = \cos^{-1}0$

$\theta = \frac{1}{2}\cdot \cos^{-1} 0$

$\theta = \frac{1}{2}\cdot \left(\frac{\pi}{2}+i\cdot \pi \right)$ , for all $i \in \mathbb{N}_{O}$

$\theta = \frac{\pi}{4} + i\cdot \frac{\pi}{2}$ , for all $i \in \mathbb{N}_{O}$

The first four solutions are:

x: $\sqrt{2}$ $-\sqrt{2}$ $-\sqrt{2}$ $\sqrt{2}$

y: 1 -1 1 -1

The solutions listed from the smallest to the greatest are:

x: $-\sqrt{2}$ $-\sqrt{2}$ $\sqrt{2}$ $\sqrt{2}$

y: -1 1 -1 1

6 0

2 years ago

The ratio of males to females at a party is 3 : 5

EastWind [94]

If there are 12 more females and the ratio is two up in favour of females that means that 1 equals to 6, so there are 30 females and 18 males. (30 + 18 = 48)

6 0

2 years ago

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Sally is ordering lunch at a cafeteria. She has 3 choices for her salad, 2 choices for the main course, 4 choices for dessert an

Shkiper50 [21]

Hello there,

Your correct answer would be 72. Because 3x2x4x3= 72

I Hope this helps you!

~Jurgen

6 0

3 years ago

Read 2 more answers

What number goes in the blank?? NEED HELP ASAPPP

madreJ [45]

The answer is 5 :>>>

4 0

2 years ago

14^-3x14^5 using a single positive exponent

lesya692 [45]

Answer:

1/14^3x times 14^5

Step-by-step explanation:

Sorry I dont have one but I hope this helps, GodBless.

6 0

3 years ago

Read 2 more answers