Question

Can somebody please help me with these four math questions?

Answer 1

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.

Answer 2

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