Answer:
Part 1) 
Part 2) 
Part 3) 
Part 4) 
Step-by-step explanation:
step 1
Find the length side c
Applying the Pythagoras Theorem

substitute the given values



step 2
Fin the measure of angle B
we know that
In the right triangle

substitute the given values


step 3
Find the measure of angle A
we know that
The measure of interior angles in a triangle must be equal to 180 degrees
so
∠A+∠B+∠C=180°
Remember that in a right triangle the measure of angle C is 90 degrees
we have


substitute


It takes alvin 20 weeks, and it takes buzzy 15 weeks
Answer: The percent changed because it increased by 180%.
Step-by-step explanation:
Hey there :)

↓ Is the same as

÷

Since it is a division by fraction, we can multiply by what is called the reciprocal
( The attached picture might help you )
(

) ×
↓ For this part, we need the common denominator, which is 6

×


×


×


↑
Your final answer