Plz tell me the answer of the 13th question .

(I)

firstly , we will find maximum and minimum y-value

we can see that

maximum value is 5

minimum value is -5

so, we can find amplitude

..........Answer

(II)

we know that

wave length is the length of one wave

we can see that from B to F , there is one wave

and we are given it's length as 20cm

so, wavelength is 20cm......Answer

(III)

we know that

we are given

frequency =100hz

wavelength =20cm

now, we can find velocity

............Answer

spinning a 1, 2, or 3. option d.

step-by-step explanation: when spinning a number graph up to 4, and aiming for any number less than 3, that automatically eliminates the number 4. now you have two numbers to spin on that are less than 3, but the number 3 is included in this question because it's no greater of an number than itself. i hope this you : )

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b