
via the angle sum identity for cosine.
Answer:
142°
Step-by-step explanation:

Answer:
See attached
Step-by-step explanation:
<em>All answers in one graph, refer to attached</em>
<u>The function we need is</u>
- C(x) = 100(2*5280 - x) + 180
, where 2*5280= 2 miles
Table included as well
The vertex is about x = 19 ft which corresponds the minimum cost
Any other value, including negative reveal greater cost
- <u><em>Note. there is a bit confusion over 2 miles or 2000 ft, but the graph is going to be same in shape and vertex for x, the value for cost will be different</em></u>
Answer:
4/6 or 2/3. Depends if your teacher wants it reduced.
Step-by-step explanation:
Each number has a 1 out of 6 chance to be rolled. so it's 1/6 for rolling a 3, 1/6 for rolling a 4, 1/6 for rolling a 5, and 1/6 for rolling a 6. 4 x 1/6 = 4/6