Answer:
Step-by-step explanation:
Answer:
(1) 2π - x² = 0 (2) x = 2.5 cm (3) perimeter = 10 cm
Step-by-step explanation:
(1)The area of the circular coin without the inner square removed is πr² where r = 3 cm is the radius of the coin. So, the area of the coin without the inner square removed is πr² = π(3 cm)² = 9π cm²
The area of the square of x sides removed from its center is x².
The area A of the each face of the coin is thus A = 9π - x²
Since the area of each face of the coin A = 7π cm²,
then
7π = 9π - x²
9π - 7π - x² = 0
2π - x² = 0
(2) Solve the equation 2π - x² = 0
2π - x² = 0
x² = 2π
x = ±√(2π)
x = ± 2.51 cm
Since x cannot be negative, we take the positive answer.
So, x = 2.51 cm
≅ 2.5 cm
(3) Find the perimeter of the square
The perimeter of the square, p is given by p = 4x
p = 4 × 2.51 cm
= 10.04 cm
≅ 10 cm
Answer:
m = 15 <u><em>OR</em></u> m = 0
Step-by-step explanation:
=> 
=> <em>Taking m common </em>
=> 
<em><u>Either,</u></em>
m = 0 <em><u>OR</u></em> m = 15
Answer:
A D and E is correct
Step-by-step explanation:
A )80% of 22
80 /100 *22
D) 80 /100 *22
= 0.8 *22
E) 80/100 *22
divide num and deno with 20 we get
4/5 *22
A log is a pice of wood that comes from a tree
