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3 years ago

Convert 7.5 to a decimal

Mathematics

1 answer:

julsineya [31]3 years ago

3 0

7.5 is already in decimal form.

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A satellite in a circular orbit 1250 kilometers above Earth makes one complete revolution every 110 minutes. What is its linear

Ivenika [448]

Answer:

$\large \boxed{\text{approximately 435.7 km/min}}$

Step-by-step explanation:

1. Angular speed

The angular speed ω is the angle θ swept out by the satellite in a given time t.

$\omega = \dfrac{\theta}{t} = \dfrac{2\pi}{\text{110 min}}$

2. Linear speed

The formula for the linear speed v is

v = rω, where

r = the distance from the centre of the Earth = 6378 km + 1250 km = 7628 km

$\begin{array}{rcl}v & = & r\omega\\& = & \text{7268 km} \times \dfrac{2\pi}{\text{110 min}}\\\\& \approx & \textbf{435.7 km/min}\\\end{array}\\\text{The linear speed of the satellite is $\large \boxed{\textbf{approximately 435.7 km/min}}$}$

7 0

3 years ago

Which expression represents the following calculation?

____ [38]

Answer:

(381-22)*16

Step-by-step explanation:

(381-22)*16

3 0

3 years ago

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Which answer has the smallest value?

Mademuasel [1]

Answer:

The smallest value is 2) the opposite of 50 because it is farthest left of the zero (this makes it the smallest)

Step-by-step explanation:

1) = 100

2) = -50

3) = 0

4) = -25

5) = -5

6 0

3 years ago

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Solve the equation 5(x-2)=7(x+4) for x

Sphinxa [80]

Answer:

$\boxed{\bold{x=-19}}$

Step By Step Explanation:

Expand $\bold{5\left(x-2\right): \ 5x-10}$

Expand $\bold{7\left(x+4\right): \ 7x+28}$

$\bold{5x-10=7x+28}$

Add 10 To Both Sides

$\bold{5x=7x+38}$

Subtract 7x From Both Sides

$\bold{5x-7x=7x+38-7x}$

Simplify

$\bold{-2x=38}$

Divide Both Sides By -2

$\bold{\frac{-2x}{-2}=\frac{38}{-2}}$

Simplify

$\bold{x=-19}$

3 0

3 years ago

The original price of a bicycle was $375. Now it is on

UNO [17]

Answer:

$307.50

Step-by-step explanation:

7 0

3 years ago

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