The wavelength of x rays are between 1 and 10 nanometers if a nanometer is equal to a billionth of a meter express the greatest wavelength of an x ray in meters write the expression using a negative exponer

Step-by-step explanation:

The wavelength of x rays are between 1 and 10 nanometers.

1 nm = 10⁻⁹ m

The greatest wavelength is 10 nm.

10 nm = 10 × 10⁻⁹ m

= 10⁻⁸ m

Here, (-8) is the exponent of 10.

Hence, the wavelength of the greatest wavelength of x-ray is 10⁻⁸ m.

the 4th choice is the correct one

step-by-step explanation:

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10