B, because 40 and 40 make 80 and 180-80=100<span />
We know that these two angles are in the ratio 1:2 and add to 90 because they are complementary
So we can write the equation
x+2x=90
3x=90
x=30
So the first angle measure is 30
Since they are in the ratio 1:2, the second angle is twice 30 so 60
Hope this helps
Part A: After 9 days the radius of algae was approximately 12.81 mm. The reasonable domain to point is (0,9).
Part B: The 9 on the y-intercept represents the amount of algae the experiment started with.
Part C: (12.81-10.12)/7=0.38
A unit rate is a comparison where the second value is 1. This could be miles driven per hour (one hour), the cost of one apple, the words you can type in a minute. Unit rates are helpful when trying to compare two quantities.
