$cos(247.5 deg)=cos( \frac{495deg}{2})
 = - \sqrt{ \frac{1+cos(495deg)}{2} } 
 = -\sqrt{ \frac{1- \frac{ \sqrt{2} }{2} }{2} } 
 = \frac{ \sqrt{2- \sqrt{2} } }{2}$

8 0

3 years ago

At birth, the ratio of a baby's head length to the length of the rest of its body is

postnew [5]

I would love to help but I don't know I'm so sorry

8 0

1 year ago

The volume of a right rectangular prism is 7 1/2 cm³. The height of the prism is 2 1/4 cm.

Dmitrij [34]

Answer:

Step-by-step explanation:

To find the area of the base of the prism, you would first multiply 7 1/2 and 2 1/4, which would leave you with 16.875. Next, you would divide by 2, which gives you 8.4375. Rounding up, you would have the answer C.

5 0

2 years ago