Measured in meters the wavelength of red light is about 8 times 10^-7, and the wave leung violet light is 4 times 10^-7. the wavelengths red light is how many times longer than the wavelength of violet light?
8 times 10^-7m
4 times 10^-7m
a. 4 times as long
b. 10^2 times as long
c. 2 times as long
d. 10^7 times as long

C. 2 times as long

Step-by-step explanation

8 times 10^-7 written in standard form is 0.0000008

4 times 10^-7 written in standard form is 0.0000004

divide both of them:

=2

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98