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3 years ago

Which shape is a rectangle

Mathematics

2 answers:

Alexus [3.1K]3 years ago

7 0

Answer:

the one that looks like a square

Step-by-step explanation:

Rashid [163]3 years ago

3 0

Answer:

the one on the top right, it's the closest to a rectangle out of the four

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Does anyone know the answer?

Snezhnost [94]

Answer:

188

I think so

Step-by-step explanation:

mark me brainliest pl

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3 years ago

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A gas station stands at the intersection of a north-south road and an east-west road. A police car is traveling toward the gas s

DanielleElmas [232]

Answer:

a)DL/dt is positive then L s increasing

b) L still increasing

Step-by-step explanation:

Let´s call O the place for the gas station, A the location point of police car ( at 5 miles east from the gas station ), and B the location point of the truck ( 12 miles south from a gas station.

The three points shape a right triangle with L (distance between police car and truck) then

L² = OA² + OB² at the point police car is 5 miles east and truck 12 miles south ( both from gas station)

L² = ( 5)² + (12)²

L = √ 25 + 144

L = √169

L = 13 miles

Pitagoras theorem establishes in a right triangle hypotenuse L is:

L² = a² + b² a and b are the legs then

In general

L² = x² + y ² x and y the legs over distance police-car/gas station and truck/gas station

Differentiation on both sides of the equation with respect to time give us:

2*L*DL/dt = 2*x*Dx/dt + 2*y*Dy/dt

Where Dx/dt = 130 m/h West Dy/dt = 100 m/h south

L = 13 m x = 5 m y = 12

Then by substitution

2*13*DL/dt = 2*5*130 + 2*12*100

DL/dt = (1300+ 2400) / 26

DL/dt = 142 m/h

DL/dt is positive then L s increasing

b) If truck speed is 70 m/h

DL/dt still positive but with smaller module, then L still increasing but at smaller speed

DL/dt = 1300 + 2*12*70

DL/dt = (1300 + 1680)/ 26

DL/dt = 114,6 m

7 0

3 years ago

What is 6.39 rounded to the nearest tenths?

posledela

6.4 is the answer to your question

4 0

3 years ago

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True or false the fraction 9/21 is in lowest terms

Darina [25.2K]

This is false.

9/12 in it's lowest terms is 3/7.

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3 years ago

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If a wheel with a radius of 50 inches spins at a rate of 500 revolutions per minute, find the approximate linear velocity in mil

Artyom0805 [142]

Answer:

The linear velocity in miles per our is 14789400 mph .

Step-by-step explanation:

Given as :

The radius of wheel = 50 inches

So, the diameter of wheel = 2 × radius = 2×50 = 100 inches

Or, Diameter = 100 × 1.57 miles = 157 miles

The number of revolution per minutes = 500 RPM

or, The number of revolution per hours = 500 × 60 = 30,000 RPH

Now, Circumference of wheel = $\pi$ ×diameter

Or, C = 3.14 × 157 = 492.98 miles

So, Distance cover by wheel = C × RPH × Time in hour

or, D = 492.98 × 30,000 × Time in hour

And Velocity = $\dfrac{\textrm Distance in miles }{\textrm Time in hour}$

or, V = $\dfrac{\textrm 492.98 × 30,000 × Time in hour }{\textrm Time in hour}$

or, V = 14789400 miles per hour

Hence The linear velocity in miles per our is 14789400 mph . Answer

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3 years ago