Ultrasound with a frequency of 4.40 MHz can be used to produce images of the human body. If the speed of sound in the body is the same as in salt water, 1.30 km/s, what is the length of a 4.40-MHz pressure wave in the body

0.295 m

Explanation:

Velocity of the wave= 1.3Kms-1= 1300ms-1

Frequency of the wave= 4.4MHz= 4400Hz

From

Velocity= wavelength × frequency

Wavelength= velocity/frequency

= 1300/4400

=0.295 m

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .