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3 years ago

Which ones do I choose

Mathematics

1 answer:

weeeeeb [17]3 years ago

7 0

It should be B because is a minus is in front of something that is a negative they change to be positive

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You bought 7 packs of trading cards for $37.03 how much did you pay for each pack of trading cards

zhannawk [14.2K]

$5.29 for each pack. You're welcome.

4 0

3 years ago

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What is x?? first one to answer gets 10<br> points! hurry :)

Goryan [66]

Answer:

60?

Step-by-step explanation:

12*5=60

7 0

3 years ago

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a port and a radar station are 2 mi apart on a straight shore running east and west. a ship leaves the port at noon traveling no

Rom4ik [11]

Answer:

The rate of change of the tracking angle is 0.05599 rad/sec

Step-by-step explanation:

Here the ship is traveling at 15 mi/hr north east and

Port to Radar station = 2 miles

Distance traveled by the ship in 30 minutes = 0.5 * 15 = 7.5 miles

Therefore the ship, port and radar makes a triangle with sides

2, 7.5 and x

The value of x is gotten from cosine rule as follows

x² = 2² + 7.5² - 2*2*7.5*cos(45) = 39.04

x = 6.25 miles

By sine rule we have

$\frac{sin A}{a} = \frac{sin B}{b}$

Therefore,

$\frac{sin 45}{6.25} = \frac{sin \alpha }{7.5}$

α = Angle between radar and ship α

∴ α = 58.052

Where we put

$\frac{sin 45}{6.25} = \frac{sin \alpha }{x}$ to get

$\frac{x}{6.25} = \frac{sin \alpha }{sin 45}$ and differentiate to get

$\frac{\frac{dx}{dt} }{6.25} = cos\alpha\frac{\frac{d\alpha }{dt} }{sin 45}$

$\frac{15sin45 }{6.25cos\alpha } =\frac{d\alpha }{dt} }$ = 3.208 degrees/second = 0.05599 rad/sec.

6 0

3 years ago

The figure below shows a circular fountain in a park with a garden to be planted with flowers. The parks department wants to pla

Dominik [7]

Answer: The answer is 284.

Step-by-step explanation:

The area of the garden is an annulus whose,

Outer diameter = 18 ft

Inner diameter = 18 ft - 2*3ft = 12 ft

Therefore,

Outer radius = 18/2 = 9 ft

Inner radius = 12/2 = 6 ft

Area of garden = Area of annulus

Area of garden = π*(9 ft)2 - π * (6 ft)2

Area of garden = 142

Given:

2 flowers are planted per square foot.

Therefore for 142 ft2,

Number of flowers required = 2*142 = 284

The answer is 284.

3 0

2 years ago

Express 36% as a fraction In lowest terms

Darya [45]

Answer:

9/25

Step-by-step explanation:

% = /100
36% = 36/100
36/100 = 9/25

I hope this helps!

5 0

2 years ago

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