11. the sales tax rate is 6.9%
a. find the tax paid for a pair of boots with a list price of 128
b. what is the total cost of the pair of boot

a~8.83; 128.88
b~8.83; 136.83
c~0.88; 136.83
d~0.88; 128.88

40.1%

Step-by-step explanation:

I am assuming that 192 is in 100%.

100% = 192

I then represent the value that we are looking for with .

x% = 77

By dividing both equations (100% = 192 and x% = 77) and remembering that both left hand sides of BOTH equations have the percentage unit (%).

Now, of course, we take the reciprocal, or inverse, of both sides:

x = 40.1%

Thus making the 40.1% of 192 is 77.

m∠a is 90°

m∠b is 40°

answer would be 8.64 or s = 11π/4 inches

step-by-step explanation:

s = r θ  

where s = arc length  

r = radius = 3 inches  

θ = central angle in radians = ( π /180)*165  

s = 3(π/180)*165  

= 8.64 inches