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4 years ago

WILL MARK BRAINLIEST

Mathematics

2 answers:

Alex73 [517]4 years ago

7 0

Answer:

15 inches

Step-by-step explanation:

The formula for the circumference of a circle of radius R is 2*Pi*R. Similarly, the volume of a ball enclosed by a sphere of radius R is (4/3)*Pi*R3. And the formula for the surface area of a sphere of radius R is 4*Pi*R2. And, you can check that the latter is the derivative of the former with respect to R.

Anika [276]4 years ago

6 0

Answer:

15 inches

Step-by-step explanation:

SA=4PIR^

900PI=4PIR^2

R^2=900PI/4PI

R^2=225

R=SQRT225

R=15 IN.

PROOF:

900PI=4PI^15^2

900PI=4PI*225

900PI=900PI

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Two trains leave stations 560 miles apart at the same time and travel toward each other. One train travels at 90 miles per hour

lana [24]

Answer: the two trains will meet in 2.8 hours

Step-by-step explanation:

Step 1

Speed of train A = 90mph

Speed of train B = 110 mph

Since both trains are travelling towards each other , their effective speed will be= 90 mph + 110mph= 200mph

Step 2

we know that Speed = distance / time

therefore Time = Distance / speed

Distance = 560 miles

Speed = 200 mph

Time = 560miles / 200mph

2.8 hours

5 0

3 years ago

The lengths of Brian's isopods were 16 mm, 14 mm, 6 mm,

Ilia_Sergeevich [38]

Answer:

72 mm total and 10.29 mm average.

Step-by-step explanation:

16 mm

14 mm

6 mm

3 mm

18 mm

5 mm

10 mm

72 mm total length

Divide by 7: 72/7 = 10.29 mm

6 0

3 years ago

Please help I dont understand

Anastasy [175]

Answer:

Angle 2=160

Angle 3=10

Step-by-step explanation:

The rhombus is made up of two isoceles triangle.

Angle 1 measures 160.

Since the triangle is a isoceles triangle, the opposite angles of the congruent sides is equal angles to each other.

So the reamaing angles in the top triangle are equal so we can use this equation

Remeber that triangle maximum degree it can hold is 180

$160 + x + x = 180$

$160 + 2x = 180$

$2x = 20$

$x = 10$

We have two congruent triangle side they share Three sides. SSS

This means the corresponding angle of Angle 1 is Angle 2.

Angle 2=Angle 1 by CPCTC.

Angle 2=160

Angle 3 corresponds with one of the remaining congruent angles so it measures

10.

8 0

3 years ago

A jar of marbles contains 5 blue 12 red, and 8 yellow marbles. what is is probability that you you select a blue marble, keep it

Natali5045456 [20]

Answer:

Step-by-step explanation:

Add the number of marbles together then you but the number of blue ones first 5 to 25 chances

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3 years ago

Are 0.5 and 0.50 the same

Akimi4 [234]

Answer:

yes they are the same. :)

3 0

3 years ago

Read 2 more answers