The annual rainfall in a certain region is approximately normally distributed with mean 42.1 inches and standard deviation 5.4 inches. Round answers to the nearest tenth of a percent.

a) What percentage of years will have an annual rainfall of less than 44 inches?
%
b) What percentage of years will have an annual rainfall of more than 39 inches?
%
c) What percentage of years will have an annual rainfall of between 38 inches and 43 inches?
%

10

step-by-step explanation:

7+3=10

i dont know

step-by-step explanation:

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: