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3 years ago

HELP PLEASE I NEED THIS DONE

Mathematics

1 answer:

Oduvanchick [21]3 years ago

8 0

Answer:

138.3ft^3

Step-by-step explanation:

Volume for cylinders : V = pi*r^2*h

Volume for cones : V = pi*r^2*(h/3)

Since we know the radius (r) is 2 and the height is 10 and 3 for the cylinder and cone respectively, all we do is plug in.

Volume for cylinder is about 125.7ft^3

Volume for cone is about 12.6ft^3

Then just add them together for a total of 138.3ft^3

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Find the distance between the two points rounding to the nearest tenth (if necessary).

eimsori [14]

Answer:

≈ 7.2

Step-by-step explanation:

Use distance formula:

d = √(8-4)² + (8-2)²

8 0

3 years ago

A train travels from station A to station B. If the train leaves station A and makes 75 km/hr, it arrives at station B 48 minute

SSSSS [86.1K]

Answer:

A) 290 km
B) 4 hours
C) 72.5 km/h

Step-by-step explanation:

Let distance be d and time t

At 75 km/h speed the distance is

d = 75(t - 48 min) = 75(t - 48/60 hours)

At 50 km/h speed the distance is

d = 50t + 40

Since the distance is same, we get the equation:

75(t - 48/60) = 50t + 40
75t - 75*4/5 = 50t + 40
75t - 60 = 50t + 40
75t - 50t = 40 + 60
25t = 100
t = 4 hours

A) The distance between A and B

d = 50*5 + 40 = 290 km

B) Time is

4 hours as found above

C) The speed = d/t

Speed = 290/4 = 72.5 km/h

6 0

3 years ago

How to Write the numbers 0.253 in two other forms

GrogVix [38]

Answer:

253/1000, 23.5%

Step-by-step explanation:

4 0

3 years ago

3) Solve each equation using the quadratic formula. Show a. x2 – 3x – 10 = 0

Naya [18.7K]

Answer:

Step-by-step explanation:

The quadratic formula of a quadratic equation

$ax^2+bx+c=0\\\\\text{If}\ b^2-4ac>0\ \text{then the equation has two solutions}\ x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

$\text{If}\ b^2-4ac=0\ \text{then the equation has one solution}\ x=\dfrac{-b}{2a}$

$\text{If}\ b^2-4ac$

We have:

$x^2-3x-10=0\to a=1,\ b=-3,\ c=-10\\\\b^2-4ac=(-3)^2-4(1)(-10)=9+40=49>0\\\\x=\dfrac{-(-3)\pm\sqrt{49}}{2(1)}=\dfrac{3\pm7}{2}\\\\x=\dfrac{3-7}{2}=\dfrac{-4}{2}=-2\\or\\x=\dfrac{3+7}{2}=\dfrac{10}{2}=5$

5 0

3 years ago

Johnny combined 7/4 cups of pancake mix and 3/4 of a cup of water to

aliya0001 [1]

Answer:

Step-by-step explanation:

in total there are 10/4 mixture so if one pancake is 1/4 10 pancakes can be made

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2 years ago