Answer:
soft sounds are better because the energy in the waves hitting your eardrum and if there is too much energy it could damage your ear.
Step-by-step explanation:
Answer:
18cm
Step-by-step explanation:
We have the length of the rectangle but we need to find the width which we'll call w. Area is a, l is length.
a = l * w
20 = 5 * w
divide both sides by 5 to cancel the multiplication by 5 on the right side
4 = w
The rectangle is going to have two sides that are the length of l, and two sides that are the the length of w. We're looking for the perimiter p.
p = 2l + 2w
p = (2 * 5) + (2 * 4)
p = 18
Answer:
6h^2 -4h -2
Step-by-step explanation:
(h^2 +4h -4) +(5h^2 -8h +2)
= h^2(1 +5) +h(4 -8) +(-4 +2) . . . . group like terms
= 6h^2 -4h -2
<em>V = 120 in^3</em>
<u><em>Here is why:</em></u>
The volume formula for a pyramid is:
The B stands for the area of the base, which in this case is a right triangle. We will find the area of the right triangle first, then plug it into the equation.
The area formula for a triangle is:
Plug in the numbers.
A = 45
Now we have found the area of B, we can plug it into the volume formula for the pyramid.
V = 120 in^3
In order to find the answer to this, you must first turn 4 into a fraction (4/1)
12/25 divided by 4/1 is the same as 12/25 multiplied by 1/4, because when dividing fractions, you must use the reciprocal of the divisor and multiply.
12/25 x 1/4 = 12/100 = 6/50 = 3/25
Your answer should be 3/25<span />
