Hope it a right answer for you
Answer:
16.32 made in interest
216.32 in total
Step-by-step explanation:
It’s going to be A. She was supposed to use distributive property
450/500 how much you have to how much it costs
this equals to 90 % of the complete cost
100%-90%=10%
you need a 10 % discount
hope this helps
1. Given any triangle ABC with sides BC=a, AC=b and AB=c, the following are true :
i) the larger the angle, the larger the side in front of it, and the other way around as well. (Sine Law) Let a=20 in, then the largest angle is angle A.
ii) Given the measures of the sides of a triangle. Then the cosines of any of the angles can be found by the following formula:

2.

3. m(A) = Arccos(-0.641)≈130°,
4. Remark: We calculate Arccos with a scientific calculator or computer software unless it is one of the well known values, ex Arccos(0.5)=60°, Arccos(-0.5)=120° etc