lovemichelle638

17.12.2019 • 

Mathematics

Can somebody me with these four math questions?

1. the length of a rectangle is 15 ft and its width is 10 ft. what is the effect on the area of the rectangle when all of its dimensions are multiplied by 1/5?

2. the surface area of a sphere is 100π cm². what is the volume of the sphere?

3. a hotel is in the shape of a square pyramid. each side of the base is 183 m long and the height is 110 m. what is the volume of the pyramid?

4. △bcd is a right triangle. the length of the hypotenuse is 18 cm. the length of one of the legs is 14 cm. what is the length of the other leg?

you to anyone who !

Ответ:

skywil8981

12.01.2022

Mathematics

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1.Area of rectangle=150 sq.feet
New length=15/5=3 feet
New breadth=10/5=2 feet
New area=15 sq.feet
∴Area is decreased by 135 sq.feet.

2. TSA of a sphere =4πr²=100π
⇒4r²=100
⇒r²=25
⇒r=5 cm
Volume=4/3πr³
=4/3×3.14×125
=392.5 cm³

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Ответ:

muffin261

12.01.2022

Mathematics

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For question 4, it would be a^2+b^2=c^2. So you would set up the equation as a^2+14^2=18^2. the third side would equal approximately 23cm.

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Ответ:

chloesmolinski0909

03.07.2020

Mathematics

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Finding the average of numbers requires you to find the sum of all the numbers together than divide by how many numbers there are.

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