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4 years ago

PLEASE HELP ME!!!!!!!!

Mathematics

2 answers:

choli [55]4 years ago

4 0

I would say that question 5 is defiantly true

miv72 [106K]4 years ago

3 0

Question 5: True
Question 6: False
Question 7: 23.32
Question 8: 6.73

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What is the width of a prism that has a volume of 1664 cubic centimeters, a length of 16 centimeters, and a height of 8 centimet

UkoKoshka [18]

Volume = length * width * height Plugging in given values:-
1664 = 16 * w * 8

w 1664 / 16*8 = 13

Width is 13 cms Answer

5 0

4 years ago

Read 2 more answers

Can someone help me with these questions

Whitepunk [10]

1. C

3/8 = 0.375

Hope this helped.

8 0

3 years ago

Until 2014, the mass of a kilogram was defined as exactly equal to the mass of a special

emmainna [20.7K]

Step-by-step explanation:

We have,

Diameter of cylinder, d = 39.2 mm

Radius, r = 19.6 cm

Height of the cylinder, h = 39.2 mm

It is required to find the surface area of this cylinder. The formula of the surface area of cylinder is given by :

$S=2\pi rh+2\pi r^2\\\\S=2\pi r(h+r)$

Putting all values we get :

$S=2\times\dfrac{22}{7}\times19.6\cdot(39.2+19.6)\\\\S=7244.16\ mm^2$

7 0

3 years ago

Someone please help me!!!!

BARSIC [14]

Answer: see proof below

<u>Step-by-step explanation:</u>

Use the Double Angle Identity: cos 2A = 2cos²A - 1

Use the Difference Identity: cos (A - B) = cosA · cosB + sinA · sinB

Use the Unit Circle to evaluate: cos (π/2) = 0 & sin (π/2) = 1

<u>Proof LHS → RHS</u>

$\text{Given:}\qquad \qquad \qquad \qquad 2\cos^2\bigg(\dfrac{\pi}{4}-\dfrac{A}{2}\bigg)-1\\\\\\\text{Double Angle Identity:}\quad \cos2\bigg(\dfrac{\pi}{4}-\dfrac{A}{2}\bigg)\\\\\\\text{Simplify:}\qquad \qquad \qquad \quad \cos\bigg(\dfrac{\pi}{2}-A\bigg)\\\\\\\text{Difference Identity:}\qquad \cos\dfrac{\pi}{2}\cdot \cos A+\sin \dfrac{\pi}{2}\cdot \sin A\\\\\\\text{Unit Circle:}\qquad \qquad \qquad 0\cdot \cos A+1\cdot \sin A\\\\\\\text{Simplify:}\qquad \qquad \qquad \qquad \sin A$

LHS = RHS: sin A = sin A $\checkmark$

4 0

4 years ago

Read 2 more answers

What’s greater - 2/6 or - 3/8 or is it equal

Vera_Pavlovna [14]

Answer:

3/8 is greater

Step-by-step explanation:

6 0

3 years ago