B
Explanation: I guessed and it was right
Answer: the circumference is 25.13 and the area is 50.26 if rounding up then 50.27
Step-by-step explanation: to find circumference it is 2piR and to find the area it is piR^2
If the price went down $5 per day for four days straight, then it would have went down $20 total after the four days.
Answer:
value of x = 2.8
Step-by-step explanation:
By law of cosines,
![{a}^{2} = {b}^{2} + {c}^{2} - 2 \times b \times c \times cos(100) \\ {x}^{2} = {13}^{2} + {10}^{2} - (2 \times 13 \times 10 \times cos100) \\ = 169 + 100 - 260 \times 0.862 \\ = 269 - 260 \times 0.862 \\ = 7.758 \\x = \sqrt{7.758 } \\ = 2.785 \\ = approx \: 2.8](https://tex.z-dn.net/?f=%20%20%7Ba%7D%5E%7B2%7D%20%20%3D%20%20%7Bb%7D%5E%7B2%7D%20%20%2B%20%20%7Bc%7D%5E%7B2%7D%20%20%20-%202%20%5Ctimes%20b%20%5Ctimes%20c%20%5Ctimes%20cos%28100%29%20%5C%5C%20%20%7Bx%7D%5E%7B2%7D%20%20%3D%20%20%7B13%7D%5E%7B2%7D%20%20%2B%20%20%7B10%7D%5E%7B2%7D%20%20-%20%282%20%5Ctimes%2013%20%5Ctimes%2010%20%5Ctimes%20cos100%29%20%5C%5C%20%20%3D%20169%20%2B%20100%20-%20260%20%5Ctimes%200.862%20%5C%5C%20%20%3D%20269%20-%20260%20%5Ctimes%200.862%20%5C%5C%20%20%3D%207.758%20%5C%5Cx%20%3D%20%20%5Csqrt%7B7.758%20%7D%20%20%5C%5C%20%20%3D%202.785%20%5C%5C%20%20%3D%20approx%20%5C%3A%202.8)