How does the rate of a proportional tax change with income?
a.
the rate increases as income increases.
b.
the rate remains the same, even if income increases or decreases
с.
the rate decreases as income increases
d.
the rate decreases as income decreases.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

i need a picture

step-by-step explanation:

the answer is 15.50 for one mile

b) is slope: 0   y- intercept 15.5

measurement of the swimming pool is given as = 7 yards 4.79 feet

first we will convert this to yards only.

1 foot = 0.33 yards

so, 4.79 feet = yards

so total yards are = yards

now we will convert this in meters.

1 yard = 0.914 meters

8.580 yards = meters

0.842 m = 0.842*100 = 84.2 cm

this becomes 7 meters and 84.2 cm

hence, the pool is 7 meters and 84.2 cm wide.